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Give an example when work done by the fo...

Give an example when work done by the force of gravity acting on a body is zero even though the body gets displaced from its initial position.

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To solve the question, we need to provide an example where the work done by the force of gravity is zero, even though the body is displaced. ### Step-by-Step Solution: 1. **Understanding Work Done**: Work done (W) by a force is given by the formula: \[ W = F \cdot d \cdot \cos(\theta) ...
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Knowledge Check

  • Assertion: Work done by the force of friction in moving a body around a closed loop is zero. Reason: Work done does not depend upon the nature of force.

    A
    If both assertion and reason are true and reason is the correct explanation of assertion.
    B
    If both assertion and reason are true not but reason is not the correct explanation of assertion.
    C
    If assertion is true but reason is false
    D
    If both assertion and reason are false.

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    In Which of the following cases the net force acting on the body is not zero ?

    When is the work done by a force is positive and when is it negative ?

    The more the force is applied on a body to cause displacement, the more is the work done.

    State the following statements as true or false. a. The work done by a force on a body is equal to the dot product of the force and displacement of the body. b. Instantaneously, work is not defined. c. When several forces act on a body, the total work is the same as the work done by their resultant.

    Asseration : In circular motion work done by all the forces acting on the body is zero. Reason : Centripetal force and veloity are mutually perpendicular.

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