1 00:00:17,670 --> 00:00:21,980 ten nine eight we have a go for main 2 00:00:21,980 --> 00:00:21,990 ten nine eight we have a go for main 3 00:00:21,990 --> 00:00:24,259 ten nine eight we have a go for main engine start we have main engine start 4 00:00:24,259 --> 00:00:24,269 engine start we have main engine start 5 00:00:24,269 --> 00:00:28,189 engine start we have main engine start four three two one 6 00:00:28,189 --> 00:00:28,199 four three two one 7 00:00:28,199 --> 00:00:31,760 four three two one bill and liftoff liftoff of the space 8 00:00:31,760 --> 00:00:31,770 bill and liftoff liftoff of the space 9 00:00:31,770 --> 00:01:48,719 bill and liftoff liftoff of the space shuttle and it has cleared the tower 10 00:01:48,719 --> 00:01:48,729 11 00:01:48,729 --> 00:01:55,740 discover a performance nominal Roger 12 00:01:55,740 --> 00:01:55,750 13 00:01:55,750 --> 00:01:59,529 how's the picture cover back Kevin great 14 00:01:59,529 --> 00:01:59,539 how's the picture cover back Kevin great 15 00:01:59,539 --> 00:02:06,940 how's the picture cover back Kevin great picture hello and welcome to the flight 16 00:02:06,940 --> 00:02:06,950 picture hello and welcome to the flight 17 00:02:06,950 --> 00:02:10,059 picture hello and welcome to the flight deck of discovery or 260 kilometres 18 00:02:10,059 --> 00:02:10,069 deck of discovery or 260 kilometres 19 00:02:10,069 --> 00:02:11,800 deck of discovery or 260 kilometres above the surface of the earth traveling 20 00:02:11,800 --> 00:02:11,810 above the surface of the earth traveling 21 00:02:11,810 --> 00:02:16,119 above the surface of the earth traveling at 8 kilometers per second if I look out 22 00:02:16,119 --> 00:02:16,129 at 8 kilometers per second if I look out 23 00:02:16,129 --> 00:02:22,390 at 8 kilometers per second if I look out the window I can see a light nice to you 24 00:02:22,390 --> 00:02:22,400 the window I can see a light nice to you 25 00:02:22,400 --> 00:02:28,770 the window I can see a light nice to you huh what's this 26 00:02:28,770 --> 00:02:28,780 huh what's this 27 00:02:28,780 --> 00:02:34,050 huh what's this hey macadamia nut must be lunch 28 00:02:34,050 --> 00:02:34,060 hey macadamia nut must be lunch 29 00:02:34,060 --> 00:02:39,670 hey macadamia nut must be lunch banana pudding this must be dessert one 30 00:02:39,670 --> 00:02:39,680 banana pudding this must be dessert one 31 00:02:39,680 --> 00:02:41,229 banana pudding this must be dessert one of the fun things about flying in space 32 00:02:41,229 --> 00:02:41,239 of the fun things about flying in space 33 00:02:41,239 --> 00:02:51,759 of the fun things about flying in space is that things float that's because we 34 00:02:51,759 --> 00:02:51,769 is that things float that's because we 35 00:02:51,769 --> 00:02:55,410 is that things float that's because we are in a freefall orbit about the earth 36 00:02:55,410 --> 00:02:55,420 are in a freefall orbit about the earth 37 00:02:55,420 --> 00:02:59,229 are in a freefall orbit about the earth the Space Shuttle Orbiter myself the nut 38 00:02:59,229 --> 00:02:59,239 the Space Shuttle Orbiter myself the nut 39 00:02:59,239 --> 00:03:01,780 the Space Shuttle Orbiter myself the nut and my pudding are all falling together 40 00:03:01,780 --> 00:03:01,790 and my pudding are all falling together 41 00:03:01,790 --> 00:03:05,860 and my pudding are all falling together we're weightless soft this can of 42 00:03:05,860 --> 00:03:05,870 we're weightless soft this can of 43 00:03:05,870 --> 00:03:07,750 we're weightless soft this can of pudding is weightless why did it hurt 44 00:03:07,750 --> 00:03:07,760 pudding is weightless why did it hurt 45 00:03:07,760 --> 00:03:11,530 pudding is weightless why did it hurt and hit my head the answer to this 46 00:03:11,530 --> 00:03:11,540 and hit my head the answer to this 47 00:03:11,540 --> 00:03:14,470 and hit my head the answer to this question requires a little research Wow 48 00:03:14,470 --> 00:03:14,480 question requires a little research Wow 49 00:03:14,480 --> 00:03:17,289 question requires a little research Wow let's imagine that I can send this nut 50 00:03:17,289 --> 00:03:17,299 let's imagine that I can send this nut 51 00:03:17,299 --> 00:03:19,990 let's imagine that I can send this nut and this can down to a laboratory on 52 00:03:19,990 --> 00:03:20,000 and this can down to a laboratory on 53 00:03:20,000 --> 00:03:42,520 and this can down to a laboratory on earth some catch 54 00:03:42,520 --> 00:03:42,530 55 00:03:42,530 --> 00:03:45,950 as you can see the can of pudding weighs 56 00:03:45,950 --> 00:03:45,960 as you can see the can of pudding weighs 57 00:03:45,960 --> 00:03:49,070 as you can see the can of pudding weighs 100 times more than that but weight can 58 00:03:49,070 --> 00:03:49,080 100 times more than that but weight can 59 00:03:49,080 --> 00:03:51,170 100 times more than that but weight can be confusing because weight depends on 60 00:03:51,170 --> 00:03:51,180 be confusing because weight depends on 61 00:03:51,180 --> 00:03:54,380 be confusing because weight depends on where you do the weighing on the moon 62 00:03:54,380 --> 00:03:54,390 where you do the weighing on the moon 63 00:03:54,390 --> 00:03:57,560 where you do the weighing on the moon the nut and the can weigh only 1/6 of 64 00:03:57,560 --> 00:03:57,570 the nut and the can weigh only 1/6 of 65 00:03:57,570 --> 00:04:02,390 the nut and the can weigh only 1/6 of what they do here on earth and here in 66 00:04:02,390 --> 00:04:02,400 what they do here on earth and here in 67 00:04:02,400 --> 00:04:06,020 what they do here on earth and here in orbit they both weigh the same zero so 68 00:04:06,020 --> 00:04:06,030 orbit they both weigh the same zero so 69 00:04:06,030 --> 00:04:09,350 orbit they both weigh the same zero so why is that it's because weight depends 70 00:04:09,350 --> 00:04:09,360 why is that it's because weight depends 71 00:04:09,360 --> 00:04:11,210 why is that it's because weight depends upon the gravitational pull exerted on 72 00:04:11,210 --> 00:04:11,220 upon the gravitational pull exerted on 73 00:04:11,220 --> 00:04:15,020 upon the gravitational pull exerted on objects the earth is very big so its 74 00:04:15,020 --> 00:04:15,030 objects the earth is very big so its 75 00:04:15,030 --> 00:04:18,050 objects the earth is very big so its gravitational pull is very strong the 76 00:04:18,050 --> 00:04:18,060 gravitational pull is very strong the 77 00:04:18,060 --> 00:04:19,820 gravitational pull is very strong the moon is much smaller so its 78 00:04:19,820 --> 00:04:19,830 moon is much smaller so its 79 00:04:19,830 --> 00:04:21,710 moon is much smaller so its gravitational pull is weak and objects 80 00:04:21,710 --> 00:04:21,720 gravitational pull is weak and objects 81 00:04:21,720 --> 00:04:25,970 gravitational pull is weak and objects weigh much less here on earth were in 82 00:04:25,970 --> 00:04:25,980 weigh much less here on earth were in 83 00:04:25,980 --> 00:04:28,880 weigh much less here on earth were in freefall and that makes it seem like 84 00:04:28,880 --> 00:04:28,890 freefall and that makes it seem like 85 00:04:28,890 --> 00:04:34,850 freefall and that makes it seem like there's no gravity at all so objects 86 00:04:34,850 --> 00:04:34,860 there's no gravity at all so objects 87 00:04:34,860 --> 00:04:36,230 there's no gravity at all so objects have different weight depending upon 88 00:04:36,230 --> 00:04:36,240 have different weight depending upon 89 00:04:36,240 --> 00:04:38,960 have different weight depending upon where they are well then what does that 90 00:04:38,960 --> 00:04:38,970 where they are well then what does that 91 00:04:38,970 --> 00:04:42,530 where they are well then what does that have to do with the bump on my head the 92 00:04:42,530 --> 00:04:42,540 have to do with the bump on my head the 93 00:04:42,540 --> 00:04:44,120 have to do with the bump on my head the answer lies in the fact that even though 94 00:04:44,120 --> 00:04:44,130 answer lies in the fact that even though 95 00:04:44,130 --> 00:04:46,790 answer lies in the fact that even though the pudding can has no weight it does 96 00:04:46,790 --> 00:04:46,800 the pudding can has no weight it does 97 00:04:46,800 --> 00:04:50,390 the pudding can has no weight it does have mass mass is that not a matter that 98 00:04:50,390 --> 00:04:50,400 have mass mass is that not a matter that 99 00:04:50,400 --> 00:04:53,210 have mass mass is that not a matter that is packed into an object all objects in 100 00:04:53,210 --> 00:04:53,220 is packed into an object all objects in 101 00:04:53,220 --> 00:04:56,570 is packed into an object all objects in the universe have mass weight can change 102 00:04:56,570 --> 00:04:56,580 the universe have mass weight can change 103 00:04:56,580 --> 00:05:00,020 the universe have mass weight can change but not mass the mass of this nut and of 104 00:05:00,020 --> 00:05:00,030 but not mass the mass of this nut and of 105 00:05:00,030 --> 00:05:02,060 but not mass the mass of this nut and of this pudding can remains the same no 106 00:05:02,060 --> 00:05:02,070 this pudding can remains the same no 107 00:05:02,070 --> 00:05:03,320 this pudding can remains the same no matter where they are in the universe 108 00:05:03,320 --> 00:05:03,330 matter where they are in the universe 109 00:05:03,330 --> 00:05:08,600 matter where they are in the universe even here on the orbiter the can of 110 00:05:08,600 --> 00:05:08,610 even here on the orbiter the can of 111 00:05:08,610 --> 00:05:10,640 even here on the orbiter the can of pudding has more mass in the nut so it 112 00:05:10,640 --> 00:05:10,650 pudding has more mass in the nut so it 113 00:05:10,650 --> 00:05:16,310 pudding has more mass in the nut so it hit me with more force so why have we 114 00:05:16,310 --> 00:05:16,320 hit me with more force so why have we 115 00:05:16,320 --> 00:05:19,130 hit me with more force so why have we spent all this time explaining mass to 116 00:05:19,130 --> 00:05:19,140 spent all this time explaining mass to 117 00:05:19,140 --> 00:05:21,890 spent all this time explaining mass to you well it's because you have to 118 00:05:21,890 --> 00:05:21,900 you well it's because you have to 119 00:05:21,900 --> 00:05:24,260 you well it's because you have to understand the concept of mass in order 120 00:05:24,260 --> 00:05:24,270 understand the concept of mass in order 121 00:05:24,270 --> 00:05:26,420 understand the concept of mass in order to understand Sir Isaac Newton's three 122 00:05:26,420 --> 00:05:26,430 to understand Sir Isaac Newton's three 123 00:05:26,430 --> 00:05:29,900 to understand Sir Isaac Newton's three laws of motion and that is what this 124 00:05:29,900 --> 00:05:29,910 laws of motion and that is what this 125 00:05:29,910 --> 00:05:34,040 laws of motion and that is what this show is really all about 126 00:05:34,040 --> 00:05:34,050 127 00:05:34,050 --> 00:05:38,340 Nik was a pretty smart guy about 300 128 00:05:38,340 --> 00:05:38,350 Nik was a pretty smart guy about 300 129 00:05:38,350 --> 00:05:40,080 Nik was a pretty smart guy about 300 years ago he came up with the first 130 00:05:40,080 --> 00:05:40,090 years ago he came up with the first 131 00:05:40,090 --> 00:05:42,750 years ago he came up with the first mathematical formulas to describe things 132 00:05:42,750 --> 00:05:42,760 mathematical formulas to describe things 133 00:05:42,760 --> 00:05:44,990 mathematical formulas to describe things in motion 134 00:05:44,990 --> 00:05:45,000 in motion 135 00:05:45,000 --> 00:05:47,310 in motion we couldn't have traveled up here into 136 00:05:47,310 --> 00:05:47,320 we couldn't have traveled up here into 137 00:05:47,320 --> 00:05:49,350 we couldn't have traveled up here into space without a good understanding of 138 00:05:49,350 --> 00:05:49,360 space without a good understanding of 139 00:05:49,360 --> 00:05:55,320 space without a good understanding of Newton's three laws of motion so what's 140 00:05:55,320 --> 00:05:55,330 Newton's three laws of motion so what's 141 00:05:55,330 --> 00:05:58,890 Newton's three laws of motion so what's the first law every material object 142 00:05:58,890 --> 00:05:58,900 the first law every material object 143 00:05:58,900 --> 00:06:00,690 the first law every material object continues in its state of rest or 144 00:06:00,690 --> 00:06:00,700 continues in its state of rest or 145 00:06:00,700 --> 00:06:03,240 continues in its state of rest or uniform motion in a straight line unless 146 00:06:03,240 --> 00:06:03,250 uniform motion in a straight line unless 147 00:06:03,250 --> 00:06:06,330 uniform motion in a straight line unless it is compelled to change that state by 148 00:06:06,330 --> 00:06:06,340 it is compelled to change that state by 149 00:06:06,340 --> 00:06:11,490 it is compelled to change that state by force is impressed upon it can we come 150 00:06:11,490 --> 00:06:11,500 force is impressed upon it can we come 151 00:06:11,500 --> 00:06:15,260 force is impressed upon it can we come up with a simpler way to say that an 152 00:06:15,260 --> 00:06:15,270 up with a simpler way to say that an 153 00:06:15,270 --> 00:06:17,910 up with a simpler way to say that an object at rest will remain at rest 154 00:06:17,910 --> 00:06:17,920 object at rest will remain at rest 155 00:06:17,920 --> 00:06:20,430 object at rest will remain at rest unless acted upon by an unbalanced force 156 00:06:20,430 --> 00:06:20,440 unless acted upon by an unbalanced force 157 00:06:20,440 --> 00:06:23,730 unless acted upon by an unbalanced force and an object in motion will remain in 158 00:06:23,730 --> 00:06:23,740 and an object in motion will remain in 159 00:06:23,740 --> 00:06:25,890 and an object in motion will remain in motion unless acted upon by an 160 00:06:25,890 --> 00:06:25,900 motion unless acted upon by an 161 00:06:25,900 --> 00:06:29,340 motion unless acted upon by an unbalanced force thanks professor aster 162 00:06:29,340 --> 00:06:29,350 unbalanced force thanks professor aster 163 00:06:29,350 --> 00:06:33,140 unbalanced force thanks professor aster that's much clearer you're welcome 164 00:06:33,140 --> 00:06:33,150 that's much clearer you're welcome 165 00:06:33,150 --> 00:06:37,320 that's much clearer you're welcome now for a demonstration here's the can 166 00:06:37,320 --> 00:06:37,330 now for a demonstration here's the can 167 00:06:37,330 --> 00:06:37,980 now for a demonstration here's the can of pudding 168 00:06:37,980 --> 00:06:37,990 of pudding 169 00:06:37,990 --> 00:06:40,200 of pudding it's at rest because it hasn't had any 170 00:06:40,200 --> 00:06:40,210 it's at rest because it hasn't had any 171 00:06:40,210 --> 00:06:43,020 it's at rest because it hasn't had any force applied to it so let's apply some 172 00:06:43,020 --> 00:06:43,030 force applied to it so let's apply some 173 00:06:43,030 --> 00:06:46,530 force applied to it so let's apply some force now our objects in motion and it 174 00:06:46,530 --> 00:06:46,540 force now our objects in motion and it 175 00:06:46,540 --> 00:06:48,150 force now our objects in motion and it will stay in motion at a constant speed 176 00:06:48,150 --> 00:06:48,160 will stay in motion at a constant speed 177 00:06:48,160 --> 00:06:51,120 will stay in motion at a constant speed in a straight line until it's acted on 178 00:06:51,120 --> 00:06:51,130 in a straight line until it's acted on 179 00:06:51,130 --> 00:06:55,710 in a straight line until it's acted on by an unbalanced force like a head don't 180 00:06:55,710 --> 00:06:55,720 by an unbalanced force like a head don't 181 00:06:55,720 --> 00:06:58,339 by an unbalanced force like a head don't try this at home 182 00:06:58,339 --> 00:06:58,349 try this at home 183 00:06:58,349 --> 00:07:02,459 try this at home now on to the second law it explains the 184 00:07:02,459 --> 00:07:02,469 now on to the second law it explains the 185 00:07:02,469 --> 00:07:05,309 now on to the second law it explains the relationship between course mass and 186 00:07:05,309 --> 00:07:05,319 relationship between course mass and 187 00:07:05,319 --> 00:07:09,689 relationship between course mass and acceleration force is a push or a pump 188 00:07:09,689 --> 00:07:09,699 acceleration force is a push or a pump 189 00:07:09,699 --> 00:07:17,300 acceleration force is a push or a pump and we already know about mass 190 00:07:17,300 --> 00:07:17,310 191 00:07:17,310 --> 00:07:19,890 acceleration is how fast an object 192 00:07:19,890 --> 00:07:19,900 acceleration is how fast an object 193 00:07:19,900 --> 00:07:25,790 acceleration is how fast an object changes its speed here's our can again 194 00:07:25,790 --> 00:07:25,800 changes its speed here's our can again 195 00:07:25,800 --> 00:07:29,100 changes its speed here's our can again we'll use this little air puffer to 196 00:07:29,100 --> 00:07:29,110 we'll use this little air puffer to 197 00:07:29,110 --> 00:07:31,019 we'll use this little air puffer to apply a gentle force to it for a short 198 00:07:31,019 --> 00:07:31,029 apply a gentle force to it for a short 199 00:07:31,029 --> 00:07:41,269 apply a gentle force to it for a short time see it doesn't accelerate very much 200 00:07:41,269 --> 00:07:41,279 201 00:07:41,279 --> 00:07:46,619 now we'll apply a greater force that did 202 00:07:46,619 --> 00:07:46,629 now we'll apply a greater force that did 203 00:07:46,629 --> 00:07:49,830 now we'll apply a greater force that did it it really accelerated that time the 204 00:07:49,830 --> 00:07:49,840 it it really accelerated that time the 205 00:07:49,840 --> 00:07:51,990 it it really accelerated that time the greater the force are greater the cans 206 00:07:51,990 --> 00:07:52,000 greater the force are greater the cans 207 00:07:52,000 --> 00:07:55,850 greater the force are greater the cans acceleration but how does mass come in 208 00:07:55,850 --> 00:07:55,860 acceleration but how does mass come in 209 00:07:55,860 --> 00:07:58,679 acceleration but how does mass come in the mass of an object affects how fast 210 00:07:58,679 --> 00:07:58,689 the mass of an object affects how fast 211 00:07:58,689 --> 00:08:00,689 the mass of an object affects how fast it will accelerate when a force is 212 00:08:00,689 --> 00:08:00,699 it will accelerate when a force is 213 00:08:00,699 --> 00:08:04,439 it will accelerate when a force is applied if you apply an equal amount of 214 00:08:04,439 --> 00:08:04,449 applied if you apply an equal amount of 215 00:08:04,449 --> 00:08:07,050 applied if you apply an equal amount of force to two objects the object with the 216 00:08:07,050 --> 00:08:07,060 force to two objects the object with the 217 00:08:07,060 --> 00:08:11,059 force to two objects the object with the most mass accelerates the least 218 00:08:11,059 --> 00:08:11,069 most mass accelerates the least 219 00:08:11,069 --> 00:08:13,860 most mass accelerates the least here are two cans of pudding tapioca and 220 00:08:13,860 --> 00:08:13,870 here are two cans of pudding tapioca and 221 00:08:13,870 --> 00:08:16,680 here are two cans of pudding tapioca and butterscotch if we apply the same force 222 00:08:16,680 --> 00:08:16,690 butterscotch if we apply the same force 223 00:08:16,690 --> 00:08:19,260 butterscotch if we apply the same force to both cans they should both accelerate 224 00:08:19,260 --> 00:08:19,270 to both cans they should both accelerate 225 00:08:19,270 --> 00:08:20,999 to both cans they should both accelerate the same and travel at the same rate of 226 00:08:20,999 --> 00:08:21,009 the same and travel at the same rate of 227 00:08:21,009 --> 00:08:28,860 the same and travel at the same rate of speed right let's try 228 00:08:28,860 --> 00:08:28,870 229 00:08:28,870 --> 00:08:31,050 what happened one can seems to have 230 00:08:31,050 --> 00:08:31,060 what happened one can seems to have 231 00:08:31,060 --> 00:08:36,170 what happened one can seems to have accelerated more was Isaac Newton wrong 232 00:08:36,170 --> 00:08:36,180 233 00:08:36,180 --> 00:08:39,930 wait here's the problem someone eats 234 00:08:39,930 --> 00:08:39,940 wait here's the problem someone eats 235 00:08:39,940 --> 00:08:42,390 wait here's the problem someone eats putting out of one of these cans without 236 00:08:42,390 --> 00:08:42,400 putting out of one of these cans without 237 00:08:42,400 --> 00:08:45,000 putting out of one of these cans without putting in the can the can has last 238 00:08:45,000 --> 00:08:45,010 putting in the can the can has last 239 00:08:45,010 --> 00:08:48,380 putting in the can the can has last class and thus it accelerates more 240 00:08:48,380 --> 00:08:48,390 class and thus it accelerates more 241 00:08:48,390 --> 00:08:51,390 class and thus it accelerates more Newton explained that force and mass are 242 00:08:51,390 --> 00:08:51,400 Newton explained that force and mass are 243 00:08:51,400 --> 00:08:54,000 Newton explained that force and mass are related to each other by acceleration a 244 00:08:54,000 --> 00:08:54,010 related to each other by acceleration a 245 00:08:54,010 --> 00:08:57,350 related to each other by acceleration a force is a push or a pull on the cam 246 00:08:57,350 --> 00:08:57,360 force is a push or a pull on the cam 247 00:08:57,360 --> 00:09:01,650 force is a push or a pull on the cam more force gives more acceleration mass 248 00:09:01,650 --> 00:09:01,660 more force gives more acceleration mass 249 00:09:01,660 --> 00:09:05,070 more force gives more acceleration mass resist acceleration if we gave the same 250 00:09:05,070 --> 00:09:05,080 resist acceleration if we gave the same 251 00:09:05,080 --> 00:09:08,160 resist acceleration if we gave the same push to two objects the one with less 252 00:09:08,160 --> 00:09:08,170 push to two objects the one with less 253 00:09:08,170 --> 00:09:11,430 push to two objects the one with less mass will accelerate more so here's our 254 00:09:11,430 --> 00:09:11,440 mass will accelerate more so here's our 255 00:09:11,440 --> 00:09:14,610 mass will accelerate more so here's our equation on top of the empty can and 256 00:09:14,610 --> 00:09:14,620 equation on top of the empty can and 257 00:09:14,620 --> 00:09:19,170 equation on top of the empty can and below the full force equals mass times 258 00:09:19,170 --> 00:09:19,180 below the full force equals mass times 259 00:09:19,180 --> 00:09:24,630 below the full force equals mass times acceleration so Newton wasn't wrong too 260 00:09:24,630 --> 00:09:24,640 acceleration so Newton wasn't wrong too 261 00:09:24,640 --> 00:09:32,310 acceleration so Newton wasn't wrong too late my pudding now what about Newton's 262 00:09:32,310 --> 00:09:32,320 late my pudding now what about Newton's 263 00:09:32,320 --> 00:09:35,130 late my pudding now what about Newton's third law of motion for every action 264 00:09:35,130 --> 00:09:35,140 third law of motion for every action 265 00:09:35,140 --> 00:09:38,750 third law of motion for every action there is an equal and opposite reaction 266 00:09:38,750 --> 00:09:38,760 there is an equal and opposite reaction 267 00:09:38,760 --> 00:09:41,010 there is an equal and opposite reaction well that's very easy to show up here in 268 00:09:41,010 --> 00:09:41,020 well that's very easy to show up here in 269 00:09:41,020 --> 00:09:44,850 well that's very easy to show up here in space what happens when Lacey pushes 270 00:09:44,850 --> 00:09:44,860 space what happens when Lacey pushes 271 00:09:44,860 --> 00:09:48,450 space what happens when Lacey pushes against Greg the force on each astronaut 272 00:09:48,450 --> 00:09:48,460 against Greg the force on each astronaut 273 00:09:48,460 --> 00:09:51,000 against Greg the force on each astronaut is equal and opposite so they go off in 274 00:09:51,000 --> 00:09:51,010 is equal and opposite so they go off in 275 00:09:51,010 --> 00:09:52,790 is equal and opposite so they go off in opposite directions at the same speed 276 00:09:52,790 --> 00:09:52,800 opposite directions at the same speed 277 00:09:52,800 --> 00:09:56,100 opposite directions at the same speed but once again mass plays a role in it 278 00:09:56,100 --> 00:09:56,110 but once again mass plays a role in it 279 00:09:56,110 --> 00:10:00,000 but once again mass plays a role in it all let's try that again but this time 280 00:10:00,000 --> 00:10:00,010 all let's try that again but this time 281 00:10:00,010 --> 00:10:04,620 all let's try that again but this time let's make it two against one the two 282 00:10:04,620 --> 00:10:04,630 let's make it two against one the two 283 00:10:04,630 --> 00:10:06,540 let's make it two against one the two crew members on the right have more maps 284 00:10:06,540 --> 00:10:06,550 crew members on the right have more maps 285 00:10:06,550 --> 00:10:07,890 crew members on the right have more maps together than our crew member on the 286 00:10:07,890 --> 00:10:07,900 together than our crew member on the 287 00:10:07,900 --> 00:10:10,770 together than our crew member on the left but the force is still equal when 288 00:10:10,770 --> 00:10:10,780 left but the force is still equal when 289 00:10:10,780 --> 00:10:12,870 left but the force is still equal when they push off of each other what do you 290 00:10:12,870 --> 00:10:12,880 they push off of each other what do you 291 00:10:12,880 --> 00:10:15,990 they push off of each other what do you think will happen now well you're right 292 00:10:15,990 --> 00:10:16,000 think will happen now well you're right 293 00:10:16,000 --> 00:10:17,880 think will happen now well you're right Lacey really goes sailing through the 294 00:10:17,880 --> 00:10:17,890 Lacey really goes sailing through the 295 00:10:17,890 --> 00:10:23,430 Lacey really goes sailing through the midday let's do that again this time in 296 00:10:23,430 --> 00:10:23,440 midday let's do that again this time in 297 00:10:23,440 --> 00:10:25,610 midday let's do that again this time in slow motion 298 00:10:25,610 --> 00:10:25,620 slow motion 299 00:10:25,620 --> 00:10:28,320 slow motion Lacey has less mass than the other two 300 00:10:28,320 --> 00:10:28,330 Lacey has less mass than the other two 301 00:10:28,330 --> 00:10:30,930 Lacey has less mass than the other two crew members Don and Greg and therefore 302 00:10:30,930 --> 00:10:30,940 crew members Don and Greg and therefore 303 00:10:30,940 --> 00:10:32,520 crew members Don and Greg and therefore he has a greater acceleration and 304 00:10:32,520 --> 00:10:32,530 he has a greater acceleration and 305 00:10:32,530 --> 00:10:36,810 he has a greater acceleration and travels faster let's run through these 306 00:10:36,810 --> 00:10:36,820 travels faster let's run through these 307 00:10:36,820 --> 00:10:40,470 travels faster let's run through these three laws of motion again an object at 308 00:10:40,470 --> 00:10:40,480 three laws of motion again an object at 309 00:10:40,480 --> 00:10:41,630 three laws of motion again an object at rest remain 310 00:10:41,630 --> 00:10:41,640 rest remain 311 00:10:41,640 --> 00:10:44,000 rest remain at rest unless acted upon by an 312 00:10:44,000 --> 00:10:44,010 at rest unless acted upon by an 313 00:10:44,010 --> 00:10:46,400 at rest unless acted upon by an unbalanced force and an object in motion 314 00:10:46,400 --> 00:10:46,410 unbalanced force and an object in motion 315 00:10:46,410 --> 00:10:48,920 unbalanced force and an object in motion will remain in motion at the same speed 316 00:10:48,920 --> 00:10:48,930 will remain in motion at the same speed 317 00:10:48,930 --> 00:10:51,290 will remain in motion at the same speed in the same direction unless acted upon 318 00:10:51,290 --> 00:10:51,300 in the same direction unless acted upon 319 00:10:51,300 --> 00:10:54,020 in the same direction unless acted upon by an unbalanced force the acceleration 320 00:10:54,020 --> 00:10:54,030 by an unbalanced force the acceleration 321 00:10:54,030 --> 00:10:56,720 by an unbalanced force the acceleration of an object depends upon its mass and 322 00:10:56,720 --> 00:10:56,730 of an object depends upon its mass and 323 00:10:56,730 --> 00:11:01,540 of an object depends upon its mass and the size of the force applied to it and 324 00:11:01,540 --> 00:11:01,550 325 00:11:01,550 --> 00:11:04,010 for every action there is an equal and 326 00:11:04,010 --> 00:11:04,020 for every action there is an equal and 327 00:11:04,020 --> 00:11:09,140 for every action there is an equal and opposite reaction Newton's three laws of 328 00:11:09,140 --> 00:11:09,150 opposite reaction Newton's three laws of 329 00:11:09,150 --> 00:11:11,990 opposite reaction Newton's three laws of motion are not just formulas or words on 330 00:11:11,990 --> 00:11:12,000 motion are not just formulas or words on 331 00:11:12,000 --> 00:11:14,060 motion are not just formulas or words on paper they're all around us and 332 00:11:14,060 --> 00:11:14,070 paper they're all around us and 333 00:11:14,070 --> 00:12:34,670 paper they're all around us and everything we do 334 00:12:34,670 --> 00:12:34,680 335 00:12:34,680 --> 00:12:36,740 you