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A cyclist comes to a skidding stop in 10...

A cyclist comes to a skidding stop in `10m`. During this process, the force on the cycle due to the road is `200N` and is directly opposite to the motion.
a. How much work does the road do on the cycle?
b. How much work does the cycle do on the road?

Text Solution

Verified by Experts

Work done on the cycle by the road is the work done by the stopping (frictional) force on the cycle due to the road.
From Newton.s Third Law an equal and opposite force acts on the road due to the cycle. Its magnitude is 200 N. However, the road undergoes no displacement. Thus, work done by cycle on the road zero.
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