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Question
Physics
Assertion: Centripetal force does no work. Reason: Force and displacement are perpendicular to each other.
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Q.
Assertion :
Centripetal force does no work.
Reason :
Force and displacement are perpendicular to each other.
AIIMS
AIIMS 2001
Work, Energy and Power
A
If both A and and Reason are true and Reason is the correct explanation of Assertion
55%
B
If both Assertion and Reason are true but Reason is not the correct explanation of Assertion
27%
C
If Assertion is true but Reason is false
8%
D
If Assertion is false but Reason is true
10%
Solution:
Since centripetal force is perpendicular to the displacement of the body, work done is zero as
$W = \vec{F}.\vec{d} = Fd \,\cos\theta$