Projectile Motion Question!! HELP!! 1. The problem statement, all variables and given/known data There is a marble (15g) in a spring shooter that is shot at 30 m\s at 55 degrees. The ball is on the spring shooter for .01s. 2. Relevant equations What is the change in momentum right as it is shot? What is the force? What is the Vi,y? What is the Vi,x? How high is the apogee? What is the total delta X? What is the gravitational potential energy at the apogee? What is the kinetic energy? What is the spring constant? What is the rebounce force? What is the force to reload? What is the work done on the marble? 3. The attempt at a solution well i got the Vi, y and x by doing 30sing55 and 30cos55. I'm guessing the change in momentum is .015(30sin55) because it's only in the y direction. The only ones that are tripping me up are the spring constant, rebounce force, and force to reload? Please help!!!