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## A pails of mass 10 kg is attached vertically to a pulley so that it can be lifted. The pail is lifted 7 meters how much work was done on the

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## Answers ( )

Answer: 686 joules

Explanation:

Given that,

mass = 10 kg

distance = 7 meter

Work done on the pail = ?

Recall that work is done when force is applied on an object over a distance.

i.e Work = Force x distance (h)

(since force = mass x acceleration due to gravity (g))

Work = mgh

Work = 10kg x 9.8m/s^2 x 7m

Work = 686 joules

Thus, 686 joules of work was done on the pail.