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 B. 61 J C. 140 J D. 200 J

Physics for Scientists and Engineers with Modern Physics
10th Edition
ISBN:9781337553292
Author:Raymond A. Serway, John W. Jewett
Publisher:Raymond A. Serway, John W. Jewett
Chapter7: Energy Of A System
Section: Chapter Questions
Problem 9P: A particle is subject to a force Fx that varies with position as shown in Figure P7.9. Find the work...
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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
B. 61 J
C. 140 J
D. 200 J
Transcribed Image Text: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 B. 61 J C. 140 J D. 200 J
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