Could someone help me with the set up of these problems? 1.)A hockey puck, mass 0.120 kg, moving at 30.0 m/s, strikes an octopus thrown on the ice by a fan. The octopus has a mass of 0.275 kg. The puck and octopus slide off together. Find their velocity. 2.)A 0.21-kg ball is placed on a compressed spring on the floor. The spring exerts an average force of 2.7 N through a distance of 13 cm as it shoots the ball upward. How high will the ball travel above the release spring?