Giancoli's Physics: Principles with Applications, 7th Edition
6
Work and Energy
Change chapter6-1: Work, Constant Force
6-2: Work, Varying Force
6-3: Kinetic Energy; Work-Energy Principle
6-4 and 6-5: Potential Energy
6-6 and 6-7: Conservation of Mechanical Energy
6-8 and 6-9: Law of Conservation of Energy
6-10: Power
Question by Giancoli, Douglas C., Physics: Principles with Applications, 7th Ed., ©2014, Reprinted by permission of Pearson Education Inc., New York.
Problem 64
Q
How much work can a 2.0-hp motor do in 1.0 h?
A
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VIDEO TRANSCRIPT
This is Giancoli Answers with Mr. Dychko. Power is the rate of doing work or work divided by time and we can isolate w by multiplying both sides by t and end up with work is power multiplied by time. So the motor is 2 horsepower motor times that by 746 watts per horsepower and then, to turn this into regular SI units, and then multiply this 1 hour by 3600 seconds per hour and you end up with 5.4 times 10 to the 6 joules of work when you round to two significant figures.
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