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Directions (Q. Nos. 1-6) These questions consist of two statements each printed as Assertion and Reason. While
answering these questions, you are required to choose any one of the following four responses
Assertion : Two blocks A and B are connected at the two ends of an ideal spring as shown in figure. Initially spring was relaxed. Now, block B is pressed. Linear momentum of the system will not remain constant till the spring reaches its initial natural length.
Reason : An external force will act from the wall on block A.

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If Assertion is correct but Reason is incorrect.

If Assertion is incorrect but Reason is correct.

If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.

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

answer is A.

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Detailed Solution

Linear momentum will not remain constant till spring will remain compressed. Therefore, a force will act on block A
from the wall.

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