The potential energy function of a particle in the x−y 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 =Ui−Uf =[k(1+1)]−[k(2+3)] =−3k