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A thief was trying to pull a 20 kg coffer (a coffer is a box usually used to hold valuables) along an essentially frictionless horizontal surface. The tension in the rope was 25 N and the rope made an angle of 30Â° with respect to the horizontal. The thief pulled the coffer over a distance of 5 m.

What was the work done on the coffer by the rope?

The coffer was pulled from rest. What was the change in the coffer´s kinetic energy by the end of the 5 m trip?

What was the coffer´s speed at the end of the trip?

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Category:- Physics
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