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

question 38

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.

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