Omar and ahmed are lifting weights in the gym. Each lifts a weight of 200N. Omar lifts the weight to a height of 2.0m, whereas ahmed lifts it to a height of 2.1m. Who does more work in lifting the weight.

Ahmed did more work in lifting the weight than Omar.

Explanation:

Work done can be determined as the product of a force and the distance moved in the direction of the force.

Work done = F x s

In the given question, since the weight is lifted through a height, then the work done equals potential energy.

i.e Work done = Potential energy

                       = mgh

But,

Force = weight = mg

So that,

Work done = Fh

where F is the weight and h is the height.

i. Work done by Omar = Fh

                            = 200 x 2.0

                            = 400

Work done by Omar is 400 Nm.

ii. Work done by Ahmed = Fh

                                     = 200 x 2.1

                                     = 420

Work done by Ahmed is 420 Nm.

Thus, Ahmed did more work in lifting the weight than Omar.

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