# An object has a mass of #5 kg#. The object's kinetic energy uniformly changes from #150 KJ# to # 42KJ# over #t in [0,8s]#. What is the average speed of the object?

##### 1 Answer

Nov 12, 2016

#### Answer:

The average speed is

#### Explanation:

The kinetic energy

Let

The average speed is

The average speed is