An object has a mass of 4 kg. The object's kinetic energy uniformly changes from 144 KJ to 120KJ over t in [0, 6 s]. What is the average speed of the object?
1 Answer
The average speed is
Explanation:
The kinetic energy is
The mass is
The initial velocity is
The final velocity is
The initial kinetic energy is
The final kinetic energy is
Therefore,
and,
The graph of
The points are
The equation of the line is
So,
We need to calculate the average value of
So,
The average speed is