Assertion : Work is done only by conservative force.
Reason : Non conservative forces are no good to do any work.
If both, Assertion and Reason are true and Reason is correct explantion of Assertion.
If both, Assertion and Reason are true but Reason is not a correct explanation of the Assertion.
If Assertion is true but the Reason is false.
If both, Assertion and Reason are false.
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
- Question 1 - Select One
Work done by the conservative force on a system is equal to :
Athe change in kinetic energy of systemBthe change in potential energy of systemCthe change in total machanical energy of systemDNone of the above - Question 1 - Select One
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 .AIf both assertion and reason are corret and reason is a correct explanation of the assertion .BIf both assertion and reason are correct but reason is not the correct explanation of assertion .CIf assertion is correct but reason is incorrect .DIf both assertion and reason are incorrect .
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Concept of conservative and non conservative force
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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.
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