posted by Sylvia
A 0.4-kg ball has a velocity of 20 m/s.
a. What is the kinetic energy of the ball?
b. How much work was required to lift the box to this position?
Are you related to Katherine? Maybe you can help each other.
a) Kinetic Energy = (1/2) M V^2
Have you never seen that formula before?
Well, now you have.
b) How far (vertically) was it lifted? Compute the potential energy dfference.
That will be the answer.
How did the ball turn into a box?