Aconstruction worker is carrying a load of 40 kilograms over his head and is walking at a constant velocity. if he travels a distance of 50 meters, how much work is being done?
a. 0 joules
b. 2.0 × 102 joules
c. 2.0 × 103 joules
d. 1.9 × 104 joules

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=