1. A 20 horsepower engine is used to lift gravel from the ground to the top of a building 60 ft high. Neglecting loss of energy due to friction, how many tons of gravel can be lifted in 50 minutes? 1 hp = 33.000 ft-lb per minute 1 ton = 2000 lb 2.The engines of an airplane exerts a force of 4,000 lb when traveling with a constant velocity of 300 mi/hr. How much horsepower is delivered?
1. A 20 horsepower engine is used to lift gravel from the ground to the top of a building 60 ft high. Neglecting loss of energy due to friction, how many tons of gravel can be lifted in 50 minutes? 1 hp = 33.000 ft-lb per minute 1 ton = 2000 lb 2.The engines of an airplane exerts a force of 4,000 lb when traveling with a constant velocity of 300 mi/hr. How much horsepower is delivered?
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 38PE: (a) How long will it take an 850-kg car with a useful power output of 40.0 hp (1hp=746W) to reach a...
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1. A 20 horsepower engine is used to lift gravel from the ground to the top of a building 60 ft high. Neglecting loss of energy due to friction, how many tons of gravel can be lifted in 50 minutes?
1 hp = 33.000 ft-lb per minute 1 ton = 2000 lb
2.The engines of an airplane exerts a force of 4,000 lb when traveling with a constant velocity of 300 mi/hr. How much horsepower is delivered?
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what formula is this "E= 33000×20×50 = 33000000 ft- lb. (1)"
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