1 00:00:00,533 --> 00:00:15,215 [ MUSIC ] 2 00:00:15,215 --> 00:00:16,182 >> WELCOME TO THE INTERNATIONAL 3 00:00:16,182 --> 00:00:17,484 SPACE STATION. 4 00:00:17,484 --> 00:00:19,152 I'M ASTRONAUT JOE ACABA. 5 00:00:19,152 --> 00:00:20,420 TODAY WE'RE GOING TO TALK 6 00:00:20,420 --> 00:00:21,855 ABOUT POTENTIAL AND 7 00:00:21,855 --> 00:00:23,189 KINETIC ENERGY. 8 00:00:23,189 --> 00:00:25,959 LET'S GET STARTED. 9 00:00:25,959 --> 00:00:27,627 KINETIC ENERGY IS THE ENERGY 10 00:00:27,627 --> 00:00:29,496 AN OBJECT HAS BECAUSE OF 11 00:00:29,496 --> 00:00:31,231 ITS MOTION. 12 00:00:31,231 --> 00:00:32,632 AN OBJECT CAN STORE ENERGY 13 00:00:32,632 --> 00:00:34,234 BASED ON ITS POSITION-- THIS IS 14 00:00:34,234 --> 00:00:37,437 CALLED POTENTIAL ENERGY. 15 00:00:37,437 --> 00:00:38,638 ON EARTH, IMAGINE 16 00:00:38,638 --> 00:00:39,639 DROPPING AN OBJECT FROM 17 00:00:39,639 --> 00:00:41,241 A RAISED POSITION. 18 00:00:41,241 --> 00:00:42,575 AS AN OBJECT'S ALTITUDE ABOVE 19 00:00:42,575 --> 00:00:44,577 THE EARTH'S SURFACE INCREASES, 20 00:00:44,577 --> 00:00:45,578 ITS GRAVITATIONAL POTENTIAL 21 00:00:45,578 --> 00:00:48,415 ENERGY ALSO INCREASES. 22 00:00:48,415 --> 00:00:49,516 THE POTENTIAL ENERGY STORED 23 00:00:49,516 --> 00:00:50,650 DUE TO ITS POSITION 24 00:00:50,650 --> 00:00:51,851 IS NOW BEING CONVERTED 25 00:00:51,851 --> 00:00:54,454 TO KINETIC ENERGY. 26 00:00:54,454 --> 00:00:55,889 WE ALSO OBSERVE THIS WITH 27 00:00:55,889 --> 00:00:58,825 ELASTIC POTENTIAL ENERGY. 28 00:00:58,825 --> 00:01:00,360 >> OKAY, NEW TERM. 29 00:01:00,360 --> 00:01:01,761 ELASTIC POTENTIAL ENERGY 30 00:01:01,761 --> 00:01:02,896 OCCURS WHEN OBJECTS ARE 31 00:01:02,896 --> 00:01:04,164 COMPRESSED AND STRETCHED, 32 00:01:04,164 --> 00:01:05,398 OR GENERALLY DEFORMED 33 00:01:05,398 --> 00:01:06,833 IN ANY MANNER, CREATING 34 00:01:06,833 --> 00:01:08,368 POTENTIAL ENERGY. 35 00:01:08,368 --> 00:01:09,369 THINK OF THIS BUNGEE, 36 00:01:09,369 --> 00:01:11,404 OR A SPRING. 37 00:01:11,404 --> 00:01:13,840 OKAY, JOE, WHAT'S NEXT? 38 00:01:13,840 --> 00:01:14,974 >> WE PULL BACK ON THE BAND 39 00:01:14,974 --> 00:01:18,478 AND CREATE POTENTIAL ENERGY. 40 00:01:18,478 --> 00:01:19,579 WHEN WE RELEASE THE POTENTIAL 41 00:01:19,579 --> 00:01:21,114 ENERGY, IT'S CONVERTED 42 00:01:21,114 --> 00:01:25,218 TO KINETIC ENERGY. 43 00:01:25,218 --> 00:01:26,486 HERE ON THE INTERNATIONAL 44 00:01:26,486 --> 00:01:28,455 SPACE STATION, WE ARE STILL 45 00:01:28,455 --> 00:01:29,622 UNDER THE INFLUENCE OF 46 00:01:29,622 --> 00:01:31,391 GRAVITY, PRIMARILY DUE TO 47 00:01:31,391 --> 00:01:33,726 OUR POSITION WITH THE EARTH. 48 00:01:33,726 --> 00:01:34,861 SO WHEN I HAVE THIS BALL 49 00:01:34,861 --> 00:01:36,463 ON THIS RAMP, NORMALLY 50 00:01:36,463 --> 00:01:37,764 BACK ON EARTH, I RELEASE 51 00:01:37,764 --> 00:01:39,766 THE BALL AND IT ROLLS 52 00:01:39,766 --> 00:01:41,734 DOWN THE RAMP DUE TO A CHANGE 53 00:01:41,734 --> 00:01:43,536 IN ITS POTENTIAL ENERGY 54 00:01:43,536 --> 00:01:44,537 THAT'S BEING TRANSFERRED 55 00:01:44,537 --> 00:01:46,039 TO KINETIC ENERGY. 56 00:01:46,039 --> 00:01:47,173 BUT AS YOU CAN SEE, 57 00:01:47,173 --> 00:01:48,908 IT DOESN'T HAPPEN HERE. 58 00:01:48,908 --> 00:01:50,243 SO IT DOESN'T MEAN THAT 59 00:01:50,243 --> 00:01:51,277 WE DON'T HAVE POTENTIAL 60 00:01:51,277 --> 00:01:52,512 ENERGY-- IT JUST MEANS 61 00:01:52,512 --> 00:01:53,546 WE'RE NOT CONVERTING IT 62 00:01:53,546 --> 00:01:56,316 AT THIS TIME TO KINETIC ENERGY. 63 00:01:56,316 --> 00:01:58,418 AND WHY IS THAT? 64 00:01:58,418 --> 00:02:00,820 GRAVITY IS PULLING US DOWN, 65 00:02:00,820 --> 00:02:03,289 BUT WE'RE MOVING SUPER FAST. 66 00:02:03,289 --> 00:02:04,190 AND SO WHAT IT IS IS 67 00:02:04,190 --> 00:02:05,258 WE'RE BENDING AROUND 68 00:02:05,258 --> 00:02:06,860 THE EARTH IN THIS PERPETUAL 69 00:02:06,860 --> 00:02:09,929 FALLING MOTION. 70 00:02:09,929 --> 00:02:10,697 THANKS FOR JOINING ME 71 00:02:10,697 --> 00:02:11,798 ONBOARD THE INTERNATIONAL 72 00:02:11,798 --> 00:02:12,932 SPACE STATION. 73 00:02:12,932 --> 00:02:13,700 WE'RE SENDING IT 74 00:02:13,700 --> 00:02:14,667 BACK TO EARTH SO YOU CAN 75 00:02:14,667 --> 00:02:16,269 TRY YOUR OWN EXPERIMENT.