Physics for Scientists and Engineers: A Strategic Approach with Modern Physics (4th Edition)

Published by Pearson
ISBN 10: 0133942651
ISBN 13: 978-0-13394-265-1

Chapter 5 - Force and Motion - Exercises and Problems - Page 128: 21

Answer

A rocket accelerating upward.

Work Step by Step

For any object, the gravitational force will always be present. However, notice that there is no normal force acting on the object, meaning that the object is not in contact with a surface and is in the air. We can assume that drag is present since the object is moving through the air. We know that thrust points in the direction that the object is moving, which is upwards in this case, so we know that the drag must be pointing in the opposite direction of motion. Since we know the object is moving through the air, and going upwards, we can use the example of a rocket being launched into the air for this diagram.
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