What is the average velocity of an object moving with a constant acceleration?

[josh84]

Homework Statement

An object starts from rest at the origin and moves along the x-axis with a constant
acceleration of 4m/s^2. Its average velocity as it goes from x=2m to x=8m is?

Homework Equations

I think V=bt^2. But not quite sure.

The Attempt at a Solution

No idea, how to solve.

 

[rootX]

Homework Statement

An object starts from rest at the origin and moves along the x-axis with a constant
acceleration of 4m/s^2. Its average velocity as it goes from x=2m to x=8m is?

Homework Equations

I think V=bt^2. But not quite sure.

The Attempt at a Solution

No idea, how to solve.

find the general formula for average velocity.
and, find "t", using the given data, and one of those uniform acceleration equations

 

[josh84]

How do you find "t" using average velocity?

 

[rootX]

use
d= d0 + v0t+0.5gt^2 equation