Question

You are working out on a rowing machine. Each time you pull the rowing bar (which simulates the oars) toward you, it moves a distance of $1.2 \mathrm{m}$ in a time of $1.5 \mathrm{s}$. The readout on the display indicates that the average power you are producing is 82 W. What is the magnitude of the force that you exert on the handle?

Name: Problem 64, Chapter 6: Physics
Uploaded: 2020-04-10T22:09:33-08:00
Duration: 42 s
Channel: Adnan Gill
Description: You are working out on a rowing machine. Each time you pull the rowing bar (which simulates the oars) toward you, it moves a distance of 1.2 m in a time of 1.5 s. The readout on the display indicates that the average power you are producing is 82 W. What is the magnitude of the force that you exert on the handle?

   You are working out on a rowing machine. Each time you pull the rowing bar (which simulates the oars) toward you, it moves a distance of $1.2 \mathrm{m}$ in a time of $1.5 \mathrm{s}$. The readout on the display indicates that the average power you are producing is 82 W. What is the magnitude of the force that you exert on the handle?

Physics

John D. Cutnell,… 11th Edition

Chapter 6, Problem 64

Instant Answer

Solved by Expert Adnan Gill

04/10/2020

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We know the average power (P) is 82 W. Show more…

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You are working out on a rowing machine. Each time you pull the rowing bar (which simulates the oars) toward you, it moves a distance of $1.2 \mathrm{m}$ in a time of $1.5 \mathrm{s}$. The readout on the display indicates that the average power you are producing is 82 W. What is the magnitude of the force that you exert on the handle?

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Key Concepts

Power

Power is the rate at which work is done and is measured in watts (W). It indicates how fast energy is transferred or converted in any process and is calculated as the work done divided by the time taken.

Work

Work is the energy transferred when a force is applied over a distance. It is defined as the product of the force acting along the direction of movement and the displacement achieved, illustrating how forces contribute to energy changes in a system.

Force Calculation using Power and Work

By combining the definitions of power and work, one can derive an expression that relates force to power, time, and displacement. Specifically, by rearranging the power formula (Power = Work/time, with Work = Force × Distance), the force can be determined as Force = (Power × Time) / Distance, linking these fundamental mechanical concepts.

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