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
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
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ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
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Chapter1: Units, Trigonometry. And Vectors
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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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Multiple choice, Write the letter of your answer. This is all about General Physics 1: Work and Energy.
Transcribed Image Text:Work And Energy
Multiple Choice
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. 15J
C. 18J
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 106 J
D. 2.5 X 10' J
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
С. 140 J
D. 200 J
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