3) In the figure, a 900-kg crate is on a rough surface inclined at 30°. A constant external force P=7200 N is applied horizontally to the crate. While this force pushes the crate a distance of 3.0 m up the incline, its velocity changes from 1.2 m/s to 2.3 m/s. How much work does friction do during this process? '2 '1 3.0 m 30° zero 7200 3700 -7200 -3700

3) In the figure, a 900-kg crate is on a rough surface inclined at 30°. A constant external force P=7200 N is applied horizontally to the crate. While this force pushes the crate a distance of 3.0 m up the incline, its velocity changes from 1.2 m/s to 2.3 m/s. How much work does friction do during this process? '2 '1 3.0 m 30° zero 7200 3700 -7200 -3700

Name: 3) In the figure, a 900-kg crate is on a rough surface inclined at 30
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Description: 3) In the figure, a 900-kg crate is on a rough surface inclined at 30°. A constantexternal force P=7200 N is applied horizontally to the crate. While this forcepushes the crate a distance of 3.0 m up the incline, its velocity changes from 1.2m/s to

College Physics

10th Edition

ISBN:9781285737027

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter5: Energy

Section: Chapter Questions

Problem 7P: A sledge loaded with bricks has a total mass of 18.0 kg and it pulled at constant speed by a rope...

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Spiderman, whose mass is 80.0 kg, is dangling on the free end of a 12.0-m-long rope, the other end of which is fixed to a tree limb above. By repeatedly bending at the waist, he is able to get the rope in motion, eventually getting it to swing enough that he can reach a ledge when the rope makes a 60.0 angle with the vertical. How much work was done by the gravitational force on Spiderman in this maneuver?
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