Cars 'A' and 'C' look like they're moving at the same speed. If their tracks are parallel, then they're also moving with the same velocity.
No, because the energy is the capacity for performing work. Gravity is the force that draws everything to the earth's center.
No, not exactly. They jiggle and tremble and vibrate a lot, but
they always basically stay in very nearly the same place.
It's like if you're allowed to go anywhere you want in your jail cell,
you wouldn't exactly call that "moving about freely".
Velocity = displacement/time
1.6 = 253/t
t = 158.125
It takes them about 158 seconds
