Question

A force F acting on an object varies with distance x as shown here. The force is in N and x in m. The work-done by the force in moving the object from x = 2 m to x = 6 m is
9 J
13.5 J
4.5 J
7.5 J​

Answer 1

W = ∫F.dx = Area under the curve

W = ∫F.dx = Area under the curve(3×3)+21×(3)(3)=13.5J

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