For exercise, an athlete lifts a barbell that weighs 400 N from the ground to a height of 2.20 m at a constant speed in a time of 1.60 s. A. What is the output energy, in kJ (kiloJoules)? B. What is the output power, in kW (kiloWatts)

For exercise, an athlete lifts a barbell that weighs 400 N from the ground to a height of 2.20 m at a constant speed in a time of 1.60 s. A. What is the output energy, in kJ (kiloJoules)? B. What is the output power, in kW (kiloWatts)

Inquiry into Physics

8th Edition

ISBN:9781337515863

Author:Ostdiek

Publisher:Ostdiek

Chapter3: Energy And Conservation Laws

Section: Chapter Questions

Problem 36P: . An elevator is able to raise 1,000 kg to a height of 40 m in 15 s. (a) How much work does the...

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Concept explainers

Instantaneous Power

Power is defined in physics as the amount of energy transmitted or transformed per unit time. The watt is the unit of electricity in the International System of Units, equivalent to one joule per second.

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For exercise, an athlete lifts a barbell that weighs 400 N from the ground to a height of 2.20 m at a constant speed in a time of 1.60 s.

A. What is the output energy, in kJ (kiloJoules)?

B. What is the output power, in kW (kiloWatts)?

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