1. The problem statement, all variables and given/known data A ball with mass m = 0.230 kg and kinetic energy K1 = 1.16 J collides elastically with a second ball of thesame mass that is initially at rest. After the collision, the first ball moves away at an angle of θ1= 37.6° with respect to the horizontal. What is the kinetic energy of the first ball after the collision? 2. Relevant equations KE=1/2mv^2 m1v1 + m2v2(initial)=m1v1 + m2v2(final) 3. The attempt at a solution Since kinetic energy is conserved,I figured the kinetic energy of the two balls would be the same after the collision at the θ=0 position. So I then tried to solve for kinetic energy in the direction of θ=37.6. Seeing as the two kinetic energies of the masses should equal 1.16 J, I am lost on the problem and do not know where to start. I would like to be put in the right direction, not necessarily given an answer so I can figure the work out on my own.