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Q.

Read the Assertion and Reason statements and give the correct answer 

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a

Both (A) and (R) are true and (R) is the correct explanation of (A)

b

Both (A) and (R) are true but (R) is not the correct explanation of (A)

c

(A) is true but (R) is false

d

Both (A) and (R) are false

answer is A.

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Detailed Solution

Rate of change of momentum α applied force

So when pumped to a heap of sands   (the rate of change of momentum) is less because the heap goes downward with the body and increases time intervals, due to which less force is exerted on the body.

And greater time over which the motion of the athlete is stopped experience less force on heap sand and due to greater distance less force is experienced.

So, both assertion and reason are correct and the reason is the correct explanation of assertion.

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