Answered: During a bench press, does the amount…

University Physics Volume 1

18th Edition

ISBN:9781938168277

Author:William Moebs, Samuel J. Ling, Jeff Sanny

Publisher:William Moebs, Samuel J. Ling, Jeff Sanny

Chapter7: Work And Kinetic Energy

Section: Chapter Questions

Problem 20CQ: Does the work done in lifting an object depend on how fast it is lifted? Does the power expended...

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Question

During a bench press, does the amount of work, or power, required depend on the rate at which the weight is lifted?

Expert Solution

Step 1

The amount of work done is the product of the force applied and the distance through which the object under force is moved. In the case of bench press, the work done is weight that is being pushed times the distance it has moved. This implies work is independent of time. Work done will be the same whether the weight being lifted faster or slower. Hence, the amount of work done does not depend on the rate at which the weight is lifted.

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