1. The problem statement, all variables and given/known data there are two masses, the smaller sitting still, and the larger with 5 times the mass of the smaller hits it going 12 m/s. the smaller rebounds at an 80 degree angle from the direction of the original mass. the collision is elastic. find the speed of both objects and the angle of the larger one after the collision. 2. Relevant equations 1/2mv^2 (KE, which is conserved) mv (momentum, which is conserved) 3. The attempt at a solution so far i have tried using sin and cos of theta and 80 degrees to find equivalent equations using momentum(5V2sin(theta)=V1sin(80) and 60=5V2cos(theta)+V1cos(80)) and then i tried to plug variables into the KE equation or solve the equations simultaneously.