Acyclist comes to a skidding stop in 10m. During this process, the forceon the cycle due to the road is 200 N and is directy opposed to the motion.
How much work does the cycle do on the road?

Explanation

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.