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Question

For the path PQR in a conservative force field (figure), the amount of work done in carrying a body from P to Q & from Q to R are 3 J & 2 J respectively. The work done in carrying the body from P to R will be


A
7 J
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B
3 J
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C
5 J
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D
zero
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Solution

The correct option is C 5 J
We know, work done by conservative force is independent of path.
Work done (from P to R) = Work done (from P to Q) + Work done (from Q to R)
=3 J+2 J=5 J

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