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Assertion : Work is done only by conserv...

Assertion : Work is done only by conservative force.
Reason : Non conservative forces are no good to do any work.

A

If both, Assertion and Reason are true and Reason is correct explantion of Assertion.

B

If both, Assertion and Reason are true but Reason is not a correct explanation of the Assertion.

C

If Assertion is true but the Reason is false.

D

If both, Assertion and Reason are false.

Text Solution

Verified by Experts

The correct Answer is:
D
Here, both Assertion and Reason are false.
Work is done by both, conservative as well as non`-` conservative forces.
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Knowledge Check

  • Work done by the conservative force on a system is equal to :

    A
    the change in kinetic energy of system
    B
    the change in potential energy of system
    C
    the change in total machanical energy of system
    D
    None of the above

  • Assertion : Work done by conservative forces is independent of path followed by the body . Reason : Work done by non conservative forces depends on the path followed by the body .

    A
    If both assertion and reason are corret and reason is a correct explanation of the assertion .
    B
    If both assertion and reason are correct but reason is not the correct explanation of assertion .
    C
    If assertion is correct but reason is incorrect .
    D
    If both assertion and reason are incorrect .

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    Is friction a non-conservative force?

    Friction is non-conservative force. How ?

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    A force is said to be conservative if work done by or agains the force depends only on initial and final positions of the body and not on the nature of path followed. A force is said to be non-conservative, if work done by or against the force in moving a body from one position to another, depeds on the path followed between these two positions. Potential energy is defined only for conservative forces. It does not exist for non-conservative forces. Read the above passage and answer the following question : (i) Give two examples, each for conservative and non-conservative forces. (ii) Potential energy does not exist for non-conservative forces. What does it imply ini day to day life ?

    Is work done by a non conservative force always negative ? Comment.

    Define the conservative and non -conservative forces. Give examples of each.

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