Figuring out time when you have acceleration and distance.

1. Aug 24, 2011

cneedshelp

How long does it take a car to travel 30.0m if it accelerates at a rate of 2.00m/s^2?
Given
Distance- 30.0m
A-2.00m/s^2

Do I need to find vi?

2. Aug 24, 2011

1MileCrash

You must need to assume it is initially at rest, otherwise the problem is incomplete.

3. Aug 24, 2011

cneedshelp

So now I have
Distance- 30.0m
a-2.00m/s^2
vi-0m/s
So can i now use the d=1/2at^2 formula?
But we're solving for t
making the equation t, taking the square root of 2d/a right?

Last edited: Aug 24, 2011