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 10 J B. 2.5 X 105 J C. 2.5 X 106 J D. 2.5 X 10' J

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Chapter1: Units, Trigonometry. And Vectors
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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?
А. 2.5 х 10')
В. 2.5 X 105 J
С. 2.5 X 10° /
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:
А. -200 J
В. 61 J
C. 140 J
D. 200 J
Transcribed Image Text: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? А. 2.5 х 10') В. 2.5 X 105 J С. 2.5 X 10° / 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: А. -200 J В. 61 J C. 140 J D. 200 J
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