### Home > APCALC > Chapter 7 > Lesson 7.1.2 > Problem 7-19

7-19.

A point travels along the *x*-axis so that at time *t *its position is given by , where

What does

represent?The point's position along the

*x*-axis.Where is the particle located when

?Calculate

.What is the velocity of the particle when its acceleration is zero?

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