5. The amount of work done to move an object in closed vertical circle

1.	5. The amount of work done to move an object in closed vertical circle on thesurface of the earth is zero, because
Answer» The amount of work done to move an object in a closed VERTICAL circle on the surface of the earth is zero because the DISPLACEMENT of the object is zero. Work done by a FORCE in displacing a body by a small distance $dx$ is given by: $dW=\int\limits F.dx$ When the displacement of the body is zero the product of force and displacement BECOMES zero and work done by force also becomes zero. As the object MOVES in a closed vertical circle the initial position of the object is the same as the final position. And the displacement of the particle is zero. The force by the gravitational pull of the earth is $mg$ and the displacement is 0 then the work done is given by: $W=mg(0)\\W=0$

5. The amount of work done to move an object in closed vertical circle on thesurface of the earth is zero, because

Answer»

The amount of work done to move an object in a closed VERTICAL circle on the surface of the earth is zero because the DISPLACEMENT of the object is zero.

Work done by a FORCE in displacing a body by a small distance $dx$ is given by: $dW=\int\limits F.dx$

When the displacement of the body is zero the product of force and displacement BECOMES zero and work done by force also becomes zero.
As the object MOVES in a closed vertical circle the initial position of the object is the same as the final position. And the displacement of the particle is zero.
The force by the gravitational pull of the earth is $mg$ and the displacement is 0 then the work done is given by: $W=mg(0)\\W=0$

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5. The amount of work done to move an object in closed vertical circle on thesurface of the earth is zero, because​

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5. The amount of work done to move an object in closed vertical circle on thesurface of the earth is zero, because