A Man Pulls a 100-N Crate Up a Frictionless 30°slope

question 14

Multiple Choice

A man pulls a 100-N crate up a frictionless 30°slope 5 m high as shown.Assuming that the crate moves at constant speed, the work done by the man is:

• A)-500 J
• B)-250 J
• C)0 J
• D)250 J
• E)500 J

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Definitions:

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