5. Four directions at point Y are indicated as I, II, III, and IV in the figure above. Directions I and III
are vertical, II and IV are horizontal, and I is
directed along the string. Which of the following
best indicates the direction of the acceleration of
the sphere at point Y?

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=