Fundamentals of Physics Extended (10th Edition)

Published by Wiley
ISBN 10: 1-11823-072-8
ISBN 13: 978-1-11823-072-5

Chapter 6 - Force and Motion-II - Questions: 1c


As $\theta$ increases, the normal force ($F_{N}$) increases.

Work Step by Step

Normal force is equal and opposite to the force of gravity on a flat plane like this. So when the force acting downwards increases, the force acting upwards (normal force) increases with it. Increasing $\theta$ increases the vertical component of the force, meaning that more force is pulling the box down. When more force is pulling the box down, more (normal) force is pushing it up.
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