A 600 N hiker carries a 2.0 kg knapsack up a trail. After 30 minutes, the hiker is 300 m higher than his starting point. A. How much total work did the hiker do? B. Calculate the power expended by the hiker during the 30 min climb.

A 600 N hiker carries a 2.0 kg knapsack up a trail. After 30 minutes, the hiker is 300 m higher than his starting point. A. How much total work did the hiker do? B. Calculate the power expended by the hiker during the 30 min climb.

Glencoe Physics: Principles and Problems, Student Edition

1st Edition

ISBN:9780078807213

Author:Paul W. Zitzewitz

Publisher:Paul W. Zitzewitz

Chapter10: Work, Energy And Machines

Section10.1: Work And Energy

Problem 3PP

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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.

Question

A 600 N hiker carries a 2.0 kg knapsack up a trail. After 30 minutes, the hiker is 300 m higher than his
starting point.
A. How much total work did the hiker do?
B. Calculate the power expended by the hiker during the 30 min climb.

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