In order to give the apple more kinetic energy than it has right now,
you must make it move faster than it is moving right now. You could
drop it, roll it, toss it, or gingerly place it in a moving car or airplane.
Whatever method you select, motion ... specifically speed ... is the
key to kinetic energy.
If your keg is not moving the only energy your leg can have is Potential energy.
The van's AVERAGE speed on the way up the hill is
(1/2) (20 + 12) = (1/2) (32) = 16 m/s .
At an average speed of 16 m/s, it travels
(16 m/s) x (8 s) = 128 meters in 8 seconds.
Answer:
All are not true.
Explanation:
Sound needs medium to travel.
sound speed is fastest in solids.