Explain whether a person carrying a bucket of water does any work on the bucket while walking on a levelled road. 

Explain whether a person carrying a bucket of water does any work on the bucket while walking on a levelled road.

There is no net force on the bucket in horizontal direction. The only force he exerts on the bucket is against the weight mg of the bucket perpendicular to the direction of motion.

From work = Fcos90 = 0, there is no work done on the bucket

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