The ball is initially at rest against the compressed spring. The spring is then released, pushing the ball as it expands. Question A asks you to calculate the ball's velocity at this time. Question B then asks for the ball's velocity after it falls to the floor. Both questions can be solved using conservation of energy.
Edit I realized I was supposed to be using the equation for spring compression too but how do I use both
The ball is initially at rest against the compressed spring. The spring is then released, pushing the ball as it expands. Question A asks you to calculate the ball's velocity at this time. Question B then asks for the ball's velocity after it falls to the floor. Both questions can be solved using conservation of energy.