11. +-10 points OSColPhys1 7.P.006.WA. My Notes Ask Your Teacher A 56-kg rollerb

Question

11. +-10 points OSColPhys1 7.P.006.WA. My Notes Ask Your Teacher A 56-kg rollerblader skates across a skating rink floor. The graph below shows the net external force component F cos along the displacement as a function of the magnitude of the displacement d. Determine the following Fcos 40 N 5.0 m 10.0 m (a) work done by the net force component F cos acting on the rollerblader as he moves from 0 to 50 m (b) work done by the net force component F cos acting on the rollerblader from 5.0 m to 10.0 m Supporting Materials Physical Constants

Explanation / Answer

Work done = F cos × d
= Area of rectangle formed
= 40N × 5.0m
= 200 Nm
= 200 J

(b)
Work done = F cos × d
= 0 × 10.0m
= 0

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