posted by Amy .
A 0.2 kg hockey puck is placed against a spring lying on a horizontal frictionless surface. The spring is compressed 0.2 m, with the hockey puck, and then released. The hockey puck when released is able to go up a frictionless slope with an angle of 30 degrees to a height of 0.5 m. What is the spring constant? At what height up the slope is the velocity of the block half the initial velocity as it leaves the spring?