A 0.113 kg billiard ball moving at 1.54 m/s strikes a second billiard ball of the same mass moving in the opposite direction at 0.46 m/s. The second billiard ball rebounds and travels at 0.72 m/s after the head on collision. Determine the post-collision velocity of the first billiard ball. a
0.36
b
0.60
c
.8741
d
60.0

Four point charges each having charge q are located at the corners of a square having sides of length a. find symbolic expressions for the following. (a) the total electric potential at the center of the square due to the four charges (use any variable or symbol stated above along with the following as necessary: ke.) vtotal= (b) the work required to bring a fifth charge p from infinity to the center of the square (use any variable or symbol stated above along with the following as necessary: w=