# An object has a mass of #4 kg#. The object's kinetic energy uniformly changes from #96 KJ# to # 280 KJ# over #t in [0, 12 s]#. What is the average speed of the object?

##### 1 Answer

Feb 16, 2017

The average speed is

#### Explanation:

The initial kinetic energy is

So,

The final kinetic energy is

So,

On a graph velocity v/s time, we have a straight line

Area of

The average speed

so,