# Chapter 13 - For Thought and Discussion - Page 238: 7

The answer is below.

#### Work Step by Step

We know that $F=-kx$. This means that the force, and subsequently the acceleration, will be 0 when the compression of the spring is 0. Thus, when the spring is in its natural uncompressed position, the force will be 0. The velocity will be 0 when the system changes direction. This occurs when the spring is completely stretched and when it is completely compressed.

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