# An object has a mass of #2 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

Jun 11, 2016

I found

#### Explanation:

We need the speed of the object at each instant so we can use the definition of Kinetic Energy

and

using our data:

and

we can now use:

and find

we now use:

to find the distance:

So: