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Questions  

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
b
+3k
c
k
d
none of the above

detailed solution

Correct option is A

Work done by conservative force                = -ΔU                =Ui-Uf                = [k(1+1)]- [k(2+3)]                = -3k

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