MacGyver is riding on a skateboard and moving west with a velocity of 7 m/s. MacGyver has a mass of 92 kg and the skateboard has a mass of 8 kg. If MacGyver jumps off the skateboard at a velocity of 2 m/s east, what will the final velocity of the skateboard be? Show your work.

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=