A cyclist comes to a skidding stop at 10 m. During this process, the force on the cycle due to the road is 200 N and is directly opposed to the motion. How much work does the road do on the bicycle? How much work does the bicycle do on the road?
Correct answer: D. -2000 J, 0 J
- A. -2000 J, 2000 J
- B. -2000 J, 1000 J
- C. 0 J, 2000 J
- D. -2000 J, 0 J
Explanation
Work done by the road = Fd = -200 X 10 = -2000J As the road does not move, work done by bicycle = Fd = F x 0 = 0J The final answer will be -2000 J, 0 J. Hence, option D is the correct option.
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Work is done when a force produces displacement, with its value determined by the component of force along the displacement. The topic covers positive, negative and zero work, work by variable forces from force-displacement graphs, and the connection between net work and change in kinetic energy.
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