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A block Ais just placed inside a smooth ...

A block `A`is just placed inside a smooth box `B` as shown in figure. Now the box is given an acceleration `a = (2 hat(i) - 2 hat(j)) m//s ^(-2)`. Under the acceleration block `A` cannot remain in the position shown.

Block will require `ma` force for moving with acceleration `a`.

A

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

B

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

C

If Assertion is true, but the Reason is false.

D

If Assertion is false but the Reason is true.

Text Solution

Verified by Experts

The correct Answer is:
B
For `(-2hat(i))m//s^(2)` component of acceleration , a horizontal force in `- ve x -` direction is required which can be provided only by the right vertical wall of the box.
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