Just want to know if D is right and if not which is and why thank you Preview Fi
ID: 1794767 • Letter: J
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Just want to know if D is right and if not which is and why thank you
Preview File Edit View Go Tools Window Help 85%-1. Tue 7:19 PM Q.E Exam 3 (page 7 of 12) Q Search Exam 3 9. You want to lift a heavy block through a height h by attaching a string of negligible mass to it and pulling so that it moves at a constant velocity. You have the choice of lifting it either by pulling the string vertically upward or along a frictionless inclined plane (see Figure). Which one of the following statements is true? (it) The work done on the block by the tension force is the same in both cases The work done on the block by the tension force is smaller in case (i) than in case () The work done on the block by gravity is smaller in case (ii) than in case (i)? The magnitude of the tension force in the string is smaller in case (i) than in case (ii) The magnitude of the tension force in the string is the same in both cases E.Explanation / Answer
answer is A
in both cases the body is lifted to the same height h
and the workdone is independent on the path and hence W = mgh where m and h are same in both the cases.
hence w is same
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