2 A tennis ball is dropped from a height of 3 m and bounces back to a height of
1 m after hitting the ground (s = 0).
a Which of the following distance-time graphs shows this motion correctly?
6th
SKIL
4
SKU
distance, s
distance, s
time, t
B
time, t
A
distance, s
distance, s
time, t
D
timet

Aregion of space in which a measurable gravitational force is indicated by the force exerted on a test mass is called

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.

Acharge q experiences no net force at a particular point in space. which of the following situations described below must always be true? -there are no other charges nearby. -if there are other charges nearby, they must all have the same sign as q. -if there are other charges nearby, they must all have the opposite sign of q. -if there are other charges nearby, the total positive charge must equal the total negative charge. -none of the above