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Q.

A bicyclist comes to a skidding stop in 10m. During  this process, the force on the bicycle due to the road is 200 N and is directly opposed to the motion. The workdone by the cycle on the road is [NCERT Exemplar]

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a

+ 2000 J

b

-200 J

c

zero

d

- 20000 J

answer is C.

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Detailed Solution

Here, work is done by the frictional force on the cycle and is equal to -200 x 10 = - 2000 J. As the road is not moving, hence work done by the cycle on the road = zero.
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