A man carries a load of 5 kg on his head through a distance of 10 m. the minimum amount of work is done when he

A man carries a load of 5 kg on his head through a distance of 10 m. the minimum amount of work is done when he
A. Move it up an inclined plane
B. Moves it down an inclined plane
C. Moves it over a horizontal surface
D. Lifts it vertically upwards.

A man carries a load of 5 kg on his head through a distance of 10 m. the minimum amount of work is done when he

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