Three books are stacked on a top of each other, on top of a wooden table. The bo

Question

Three books are stacked on a top of each other, on top of a wooden table. The books weigh 2N, 3N, and 4Nrespectively, with the 2N book on top, (These are big books.) The normal force acting on the 3N book, (the book in the middle), is given by:

Question 2 options:

There is exactly one force applied to the block.

The net force applied to the block is directed to the left.

The net force applied to the block is directed to the right.

The net force applied to the block is zero.

There must be no forces at all applied to the block.

There is exactly one force applied to the block.

The net force applied to the block is directed to the left.

The net force applied to the block is directed to the right.

The net force applied to the block is zero.

There must be no forces at all applied to the block.

Explanation / Answer

1)

normal force on middle book

2 N by the 2N book and 5N by the 4N book

2)

The net force applied to the block is zero. ( since it is in equilibrium)

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