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A bicyclist comes to a skidding stop in ...

A bicyclist comes to a skidding stop in `10 m`. During this process, the force on the bicycle due to the road is `200 N` and is directly opposed to the motion. The work done by the cycle on the road is

A

`+200j`

B

`-200j`

C

zero

D

`-20000j`

Text Solution

Verified by Experts

The correct Answer is:
C
(c ) Here, work is done by the frictional force on the cycle and is equal to`-200xx10=-2000J`.
As the road is not moving. Hence, work done by the cycle on the road=zero
NOTE: We should be aware that here the energy of bicyclist is lost during the motion but it is lost due to friction in the form of heat.
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