A drag racer leaves the starting line and increases its speed up to 200 miles per hour by the time it crosses the finish line. What must have changed?

A. only its speed

B. only its velocity

C. both its speed and its velocity

D. neither its speed nor its velocity

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=