Assertion :Retardation is directly opposite to the velocity. Reason: Retardation is equal to the time rate of decrease of speed.
A
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
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B
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
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C
Assertion is correct but Reason is incorrect
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D
Both Assertion and Reason are incorrect
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Solution
The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion Acceleration is the time rate of increase of velocity.
But retardation is reverse of acceleration.
⟹ Retardation is time rate of decrease of velocity.
Also retardation acts in the direction opposite to that of velocity.