A ball of mass 
is thrown at an angle 
with respect to the horizontal (see the figure below). A 
of work is done when the ball is thrown. We assume that the air resistance is negligible.
What is the initial velocity of the ball?
What is the minimum kinetic energy of the ball?
What is the maximum potential energy of the ball?
How high does the ball reach during the flight?
Parabola: path of the throw
