Acar traveling at 30 m/s north slows to a stop in 15 seconds. what is the acceleration?

Compare the horizontal displacement of the two balls as they travel to the ground. what do you observe?

Avoltaic cell converts chemical energy to

Arailroad car collides with and sticks to an identical railroad car that is initially at rest. after the collision, the total kinetic energy of the two cars is a) the same as before. b) half as much as before. c) one third as much as before. d) one fourth as much as before. e) twice as much as before.