# An object has a mass of #6 kg#. The object's kinetic energy uniformly changes from #18 KJ# to # 4KJ# over #t in [0,12s]#. What is the average speed of the object?

##### 1 Answer

Feb 12, 2018

9.47 m/s

#### Explanation:

Based on the given values, the power loss (which is the constant here) is

so

We can then find the velocity at any time based on that equation:

From that equation, we can find its average:

I hope the calculus is comfortable to you.