1. The problem statement, all variables and given/known data A small cylindrical disk hits a more massive square block directly head on. Both objects slide without friction on a smooth ice surface. The block is pushed forward and the disk bounces back. Which statement is true? a) The block pushes the disk. b) The disk exerts a greater force because it is moving. c) The block exerts a greater force because it is more massive. d) The total momentum changes when they collide. e) No forces occur because the objects are just sliding (inertia). 2. Relevant equations Newton's 3rd Law and Conservation of Momentum. 3. The attempt at a solution I've narrowed down my answer to either A or E because of Newton's 3rd Law and Conservation of Momentum.