chowoch 10 gniz A shopper pushes her 25 kg grocery cart by a force of 2250 N inclined at an angle of 60° with the horizontal through a distance of 7.5 m as shown in the free-body diagram. Find the work done by (a) the 2250 N force and (b) friction. Assume that the coefficient of kinetic friction is 0.32. 95101 210
chowoch 10 gniz A shopper pushes her 25 kg grocery cart by a force of 2250 N inclined at an angle of 60° with the horizontal through a distance of 7.5 m as shown in the free-body diagram. Find the work done by (a) the 2250 N force and (b) friction. Assume that the coefficient of kinetic friction is 0.32. 95101 210
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
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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Please answer Prac. 5.1
Transcribed Image Text:Practice Exercise 5.1
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A shopper pushes her 25 kg grocery cart by a force of 2250 N inclined at
an angle of 60° with the horizontal through a distance of 7.5 m as
free-body diagram. Find the work done by (a) the 2250 N force and
(b) friction. Assume that the coefficient of kinetic friction is 0.32.
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Work Done by a Variable Force
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So far, we have assumed that the force that does the work is constant. But this assumption rarely
applies to real-life situations. More often than not, the force is varying. The total amount of work done
by a varying force may be solved graphically or analytically by calculus. Given a graph of force versus
displacement along the direction of force, the work done is the area bounded by the graph and the
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x-axis.
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