A 75-kg man is carrying a 50-kg crate as he ascends to the sixth floor of a building through an elevator. If each floor has a height of ten feet, a) how much work does. the man do on the crate? and crate? b) How much work does the elevator do on the man c) How fast did the elevator ascend if it expended 2450.0 watts? d) How long did it take the elevator to descend to the first floor if its velocity was 0.70 m/s?
A 75-kg man is carrying a 50-kg crate as he ascends to the sixth floor of a building through an elevator. If each floor has a height of ten feet, a) how much work does. the man do on the crate? and crate? b) How much work does the elevator do on the man c) How fast did the elevator ascend if it expended 2450.0 watts? d) How long did it take the elevator to descend to the first floor if its velocity was 0.70 m/s?
An Introduction to Physical Science
14th Edition
ISBN:9781305079137
Author:James Shipman, Jerry D. Wilson, Charles A. Higgins, Omar Torres
Publisher:James Shipman, Jerry D. Wilson, Charles A. Higgins, Omar Torres
Chapter4: Work And Energy
Section4.4: Power
Problem 4.3CE: A student expends 7.5 W of power in lifting a textbook 0.50 m in 1.0 s with a constant velocity. (a)...
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A 75-kg man is carrying a 50-kg crate as he ascends to the sixth floor of a building through an elevator. If each floor has a height of ten feet, a) how much work does. the man do on the crate? and crate? b) How much work does the elevator do on the man c) How fast did the elevator ascend if it expended 2450.0 watts?
d) How long did it take the elevator to descend to the first floor if its velocity was 0.70
m/s?
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