(a) How many seconds does it take a 20.0 hp motor to lift a 2200.0 lb elevator a distance of 30.0 ft? (b) What was the average velocity of the elevator? ft/s

College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
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Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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(a) How many seconds does it take a 20.0 hp motor to lift a 2200.0 lb elevator a distance of 30.0 ft?
(b) What was the average velocity of the elevator?
ft/s
A ball is dropped from 7.2 ft above the ground. Using energy considerations only, find the velocity of the ball just as it hits the ground.
Assume that alr-drag is negligible in this case.
ft/s
V=
What is the velocity of a 3350 kg car if its kinetic energy is 255.0 kJ?
m/s
Transcribed Image Text:(a) How many seconds does it take a 20.0 hp motor to lift a 2200.0 lb elevator a distance of 30.0 ft? (b) What was the average velocity of the elevator? ft/s A ball is dropped from 7.2 ft above the ground. Using energy considerations only, find the velocity of the ball just as it hits the ground. Assume that alr-drag is negligible in this case. ft/s V= What is the velocity of a 3350 kg car if its kinetic energy is 255.0 kJ? m/s
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