Author Question: A ball with original momentum +2.0 kgm/s hits a wall and bounces straight back without losing any ... (Read 91 times)

ts19998 · **on:** Jul 28, 2018

A ball with original momentum +2.0 kgm/s hits a wall and bounces straight back without losing any kinetic energy. The change in momentum of the ball is:
a. 0.
c. 4.0 kgm/s.
b. -4.0 kgm/s.
d. -8.0 kgm/s.

Question 2

Three equal positive charges are placed on the x-axis, one at the origin, one at x = 2 m, and the third at x = 4 m. Of the following points, which has the greatest magnitude electric field?
a. x = 1 m
b. x = 3 m
c. x = 5 m
d. The electric field has the same magnitude at all three positions.