- #1

- 8

- 0

## Homework Statement

A box slides along a surface with a positive initial velocity. It the experiences an acceleration of -0.25m/s^2. After traveling 4.00 meters, its velocity is +0.50m/s. How long did it take for the boxto travel the 4.00 meters?

## Homework Equations

[tex]\Delta[/tex]x=Vot + 1/2 a t^2 ??

## The Attempt at a Solution

4.00m=(.50m/s)t+1/2(.25m/s^2)(t^2)

(.125m/s^2)(t^2)+(.50m/s)(t)-(4.00m)

-(.50) + - [tex]\sqrt{(.50)^2-4(.125)(-4)/2(.125)}[/tex]

[tex]\sqrt{2}[/tex]-.50 = .9seconds?