### Home > CALC > Chapter 7 > Lesson 7.1.2 > Problem 7-20

7-20.

A point travels along the -axis so that at time

*, where*

*.*

What does

represent?The point's position along the

-axis.Where is the particle located when

?Calculate

*s*. Find the velocity of the particle when its acceleration is zero.

Velocity is the derivative of position, and acceleration is the derivative of velocity.