1. (a) What is the average useful power output of a person who does 7.00 x 106 J of useful work in 7.00 hr? Enter to 3 significant figures P= 378 W (b) Working at this rate, how long will it take this person to lift 1700 kg of bricks up a 1.5-m platform? Hint: Work done to lift his body can be omitted because it is not considered useful output here. Assume that all quantities are correct to 3 significant figures. Enter to 3 significant figures t = 2807 S

1. (a) What is the average useful power output of a person who does 7.00 x 106 J of useful work in 7.00 hr? Enter to 3 significant figures P= 378 W (b) Working at this rate, how long will it take this person to lift 1700 kg of bricks up a 1.5-m platform? Hint: Work done to lift his body can be omitted because it is not considered useful output here. Assume that all quantities are correct to 3 significant figures. Enter to 3 significant figures t = 2807 S

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Description: 1. (a) What is the average useful power output of a person who does 7.00 x 106 J of useful work in 7.00hr?Enter to 3 significant figuresP= 378Xt = 2807(b) Working at this rate, how long will it take this person to lift 1700 kg of bricks up a 1.5-m p

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter7: Work, Energy, And Energy Resources

Section: Chapter Questions

Problem 36PE: (a) What is the average useful power output of a person who does 6.00106 J of useful work in 8.00 h?...

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(a) What is the average useful power output of a person who does 6.00106J of useful work in 8.00 h? (b) Working at this rate, how long will it take this person to lift 2000 kg of bricks 1.50 m to a platform? (Work done to lift his body can be omitted because it is not considered useful output here.)
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(a) What is the average useful power output of a person who does 6.00106 J of useful work in 8.00 h? (b) Working at this rate, how long will it take this person to lift 2000 kg of bricks 1.50 m to a platform? (Work done to lift his body can be omitted because it is not considered useful output here.)
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Check Your Understanding Estimate the power expended by a weightlifter raising a 150-kg barbell 2 m in 3 s.