A 150g ball is thrown vertically upward from a window 10m above the ground at speed of 30 m/s?
At the top of its trajectory, it compresses a spring of spring constant k= 1.50 N/m a distance, y. If the spring is 25m above the initial starting position of the ball,
a) how high does the ball go above ground?
b) What is the speed of the ball when it strikes the ground?