1. The problem statement, all variables and given/known data There is a Ball that weights .150 kg and is moving at 90m/s =607.5 Joules and it is moving to the right, so its coming from the left. on the opposing side is a 35kg cart moving at 4.5m/s = 354.37 Joules The Cart has superior momentum and mass.... however, in this scenario some energy is not taken into other forms but is left for work. Ball=405 Joules Cart=201 Joules The ball hits the cart, the ball should stop the cart in a VERY short distance, it has 204 remaining Joules which it will use to push back the cart doing work. This must be true with mechanical energy, correct? My question is, is this scenario true? 2. Relevant equations TMEi+Wnc=TMEf 3. The attempt at a solution Im sure this is correct, the math works out and it still shows that ability of mechanical energy in the form of KE to do work.