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When a body like earth is moving in a ci...

When a body like earth is moving in a circular path the work done in that case is zero because:

A

Centripetal force acts in the direction of motion of the body

B

Centripetal force acts along the radius of circular path

C

Gravitational force acts along the radius of circular path

D

centrifugal force acts perpendicular to the radius of circular path

Text Solution

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The correct Answer is:
b
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Knowledge Check

  • In the following question, a statement of Assertion is followed by a statement of Reason. Assertion: When a body moves along a circular path, the work done by a centripetal force is zero. Reason: The centripetal force is utilised in moving the body along the circular path and hence the work is done. Choose one of the following statements is correct?

    A
    Both assertion and reason are true and reason is the correct explanation of the assertion
    B
    Both assertion and reason are true but reason is not correct explanation of the assertion
    C
    Assertion is true but reason is false
    D
    Both assertion and reason are false

  • In the following question, a statement of Assertion is followed by a statement of Reason. Assertion: When a body moves along a circular path, the work done by a centripetal force is zero. Reason: The centripetal force is utilised in moving the body along the circular path and hence the work is done. Choose one of the following statements is correct?

    A
    Both assertion and reason are true and reason is the correct explanation of the assertion
    B
    Both assertion and reason are true but reason is not correct explanation of the assertion
    C
    Assertion is true but reason is false
    D
    Both assertion and reason are false

  • If a body moving in a circular path with uniform speed, then

    A
    the acceleration is directed towards its centre
    B
    velocity and acceleration are perpendicular to each other
    C
    speed of the body is constant but its velocity is varying
    D
    all the above

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