# An object has a mass of #9 kg#. The object's kinetic energy uniformly changes from #135 KJ# to # 36KJ# over #t in [0, 6 s]#. What is the average speed of the object?

##### 1 Answer

Apr 19, 2016

#### Answer:

I don't produce any number as the result, but here is how you should approach.

#### Explanation:

Hence,

We know

So the rate of change of velocity

now, average velocity should be defined as: