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
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter5: Energy
Section: Chapter Questions
Problem 7CQ: As a mass tied to the end of a string strings from its highest point down to its lowest point, it is...
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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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