A white go-kart moving 5 m/s hits a red go-kart that is at rest. Both go-karts weigh 2 kilograms and the white go-kart travels in the opposite direction at 2 m/s after the collision. What is the velocity of the red
go-kart after the collision?
10 m/s
7 m/s
5 m/s
2 m/s

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=