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Your task is to move a child from the driveway to the top of the loading...

Your task is to move a child from the driveway to the top of the loading dock behind a building. There is a ramp along one side. You can (a) pick up the child and set it on the dock or (b) you can carry it up the ramp and set it onto the deck, In which case will you do the least amount of work on the child? A) The mass of the child needed to decide B) None of the other answers C) The height of the dock is needed to decided D) Plan (a) E) Plan (b)

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Answer #1

The amount of work done on carrying child of mass m to height h is mgh, where g is the acceleration due to gravity. Here work done is independent of the path travelled .Hence in both condition work done is same.

Option B is correct

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