Question

11 Assertion- When a body moves along a circular path, no work is done by the centripetal force.
Reason- The centripetal force is used in moving the body along the circular path and hence no work
is done.




plz tell guys which one is correct or both r correct​

Answer 1

Answer:

The work done by a force in moving a body is W= F. s

where s is the displacement vector.

In a circular path, the force is centripetal, thus always acting towards the center along the radial direction.

However the displacement is always along tangent to the circle at the instantaneous position of object.

Thus W= F. s=0

I hope its help you.

Answer 2

Answer : Assertion is true but Reason is false.

Explanation:

• The work done by the centripetal force is zero, when a body moves along a circular path, no work is done by the centripetal force because it acts perpendicular to the circular path.

• The work done by the centripetal force is zero because it acts perpendicular to the circular path.

Hence, Assertion is true but Reason is false.