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A 4-N force is applied to a 2-kg object that is moving at 3 m/s. This force is parallel to the object's velocity. After the object has travelled an additional 5 m, the force is removed. The work done by this force is: А. 12] В. 15) С. 18) D. 20J 8.

A 4-N force is applied to a 2-kg object that is moving at 3 m/s. This force is parallel to the object's velocity. After the object has travelled an additional 5 m, the force is removed. The work done by this force is: А. 12] В. 15) С. 18) D. 20J 8.

College Physics
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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7. A 4-N force is applied to a 2-kg object that is moving at 3 m/s. This force is parallel to the object's velocity. After the object has travelled an additional 5 m, the force is removed. The work done by this force is: А. 12) В. 15) С. 18) D. 20J 8. A dog team exerts a horizontal force to a sledge weighing 5000 N including load. It is pulled on level snow with a coefficient of kinetic friction of 0.05. How much work is done by the dog team pulling the sledge 1000 m at constant speed? A. 2.5 X 104 J В. 2.5 X 105 J C. 2.5 X 10° J D. 2.5 X 107J 9. A man pushes an 80-N crate up a frictionless slope that makes an angle of 30° with the horizontal. The man was able to push it to a distance of 5.0m along the slope with a force parallel also to the slope. However the speed of the crate decreases at a rate of 1.5 m/s?. The work being done by the man is: A. -200 J В. 61 J C. 140 J D. 200 J
Transcribed Image Text:7. A 4-N force is applied to a 2-kg object that is moving at 3 m/s. This force is parallel to the object's velocity. After the object has travelled an additional 5 m, the force is removed. The work done by this force is: А. 12) В. 15) С. 18) D. 20J 8. A dog team exerts a horizontal force to a sledge weighing 5000 N including load. It is pulled on level snow with a coefficient of kinetic friction of 0.05. How much work is done by the dog team pulling the sledge 1000 m at constant speed? A. 2.5 X 104 J В. 2.5 X 105 J C. 2.5 X 10° J D. 2.5 X 107J 9. A man pushes an 80-N crate up a frictionless slope that makes an angle of 30° with the horizontal. The man was able to push it to a distance of 5.0m along the slope with a force parallel also to the slope. However the speed of the crate decreases at a rate of 1.5 m/s?. The work being done by the man is: A. -200 J В. 61 J C. 140 J D. 200 J
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