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

Options

A. Both assertion and reason are true and the reason is correct explanation of the assertion.
B. Both Assertion and Reason are true but reason is not the correct explanation of Assertion.
C. Assertion is true, but the Reason is false.
D. Assertion is false but the Reason is true.

Answer

B

Explanation

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.