M Prep | MCAT 2015 Question of the Day - Prep, Practice Questions, and More!

Q:

Three books are at rest on a table in "pyramid fashion" (largest book on the bottom, medium in the middle, and smallest on top). The bottom book has a weight of 5 N, the middle book has a weight of 4 N, and the top book has a weight of 3 N. Which of the following correctly describes the force acting on the middle book?

A

7 N force facing downward

B

3 N force facing downward

C

4 N force facing upward

D

0 N