1. A student uses a spring gun (with a spring constant of 150 N/m) to launch a marble vertically into the air. The mass of the marble is 0.01 kg and the spring is compressed 0.025 m. How high will the marble go?

2.A children’s roller coaster is released from the top of a track. If its maximum speed at ground level is 3 m/s, find the height it was released from.
Help plzzz