# An object has a mass of #2 kg#. The object's kinetic energy uniformly changes from #16 KJ# to # 36KJ# over #t in [0, 6 s]#. What is the average speed of the object?

##### 2 Answers

The average speed is

#### Explanation:

The kinetic energy is

mass is

The initial velocity is

The final velocity is

Therefore,

and,

The graph of

The points are

The equation of the line is

So,

We need to calculate the average value of

So,

Average **velocity**

So average **speed** is

#### Explanation:

During the period we can say that:

Integrating:

And as

For average velocity

Reality check: