Sally, Who Weighs 450 N, Stands on a Skate Board

Multiple Choice

Sally, who weighs 450 N, stands on a skate board while Roger pushes it forward 13.0 m at constant velocity on a level straight street. He applies a constant 100 N force.

A) The work Roger does on the skateboard is 0 J.
B) The work Roger does on the skateboard is 1 300 J.
C) The work Sally does on the skateboard is 1 300 J.
D) The work Sally does on the skateboard is 5 850 J.
E) The work Roger does on the skateboard is 5 850 J.