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A weightlifter set a record of 147 kg. Suppose she lifted 141 kg during practice. How much work did she do on the weights to lift them above her head, a distance of 1.60 m?

Answer :

Answer:

The weights will have a change in gravitational potential energy as they are getting lifted from the gorund level to the level she wants which is 1.60 this gain is the work done by her

so mgh = 141 * 9.81 * 1.60 = 2213.136 joules

2213 joules rounding off

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