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.
B
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