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