The ball has a potential energy of 50 joules (with the potential energy equal to zero at ground level) and is moving upward with a kinetic energy of 50 joules. what is the maximum height h reached by the ball?

W*h1=50
1/2*m*v^2=50
It means that the ball is in the midway point between ground and air (no friction etc).
Thus the maximum height reached is h2=100/m*g where m is the mass of the ball in kg and g is the gravitational acceleration

To use anything transparent