A Man Pushes an 80-N Crate a Distance of 5

question 27

Multiple Choice

A man pushes an 80-N crate a distance of 5.0 m upward along a frictionless slope that makes an angle of 30°with the horizontal.The force he exerts is parallel to the slope.If the speed of the crate is constant, then the work done by the man is:

• A)-200 J
• B)61 J
• C)140 J
• D)200 J
• E)260 J

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