## College Physics (4th Edition)

Published by McGraw-Hill Education

# Chapter 4 - Conceptual Questions - Page 145: 18

#### Answer

If the velocity vector is parallel or anti-parallel (i.e. in the opposite direction) with the direction of the force, then the object moves along a straight line. However, if a component of the velocity vector is perpendicular to the direction of the force, then the object will move in a curved path.

#### Work Step by Step

If the velocity vector is parallel or anti-parallel (i.e. in the opposite direction) with the direction of the force, then the object moves along a straight line. However, if a component of the velocity vector is perpendicular to the direction of the force, then the object will move in a curved path. For example, if we throw an object straight up in the air, the object moves along a straight line. If we throw an object at an angle, then the object moves in a parabolic path.

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