Author Question: Two objects, one less massive than the other, collide elastically and bounce back after the ... (Read 103 times)

panfilo · **on:** Jul 28, 2018

Two objects, one less massive than the other, collide elastically and bounce back after the collision. If the two originally had velocities that were equal in size but opposite in direction, then which one will be moving slower after the collision?
a. The less massive one.
b. The more massive one.
c. The speeds will be the same after the collision.
d. There is no way to be sure without the actual masses.

Question 2

A charge Q accumulates on the hollow metallic dome, of radius R, of a Van de Graaff generator. A probe measures the electric field strength at various points outside the sphere's surface. By what factor will the electric field value at the 2R distance be changed if the charge value were increased to (5/3)Q?
a. 3/5
c. 5/3
b. (5/3)2
d. (3/5)2