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Question

The potential energy function of a particle in the xy plane is given by U=k(x+y), where k is a constant. The work done by the conservative force in moving a particle from (1, 1) to (2, 3) is

A
3k
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B
3k
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C
k
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D
None of the above.
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Solution

The correct option is C 3k
Work done by conservative force
=ΔU
=UiUf
=[k(1+1)][k(2+3)]
=3k

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