# If an object is moving at 5 m/s and accelerates to 12 m/s over 8 seconds, what was the object's rate of acceleration?

Dec 11, 2016

The acceleration is $\vec{a} = \frac{7}{8} \frac{m}{s} ^ 2$.

#### Explanation:

To calculate the acceleration we have to use the formula:

## $\vec{a} = \frac{\vec{\Delta v}}{\Delta t}$

The change of velocity can be calculated as:

$\vec{\Delta v} = 12 - 5 = 7 \frac{m}{s}$

Now the acceleration is: $\vec{a} = \frac{7}{8} \frac{m}{s} ^ 2$