1. Two balls make up a closed system. Ball A has315 J of energy and ball B has767 J. After they collide, ball A has605 J. How much energy does ball Bhave after they collide?
2. An asteroid and a comet collide head on. Priorto the collision, the asteroid has a momentum of 100,000 kg·m/s right and the comet has a momentum of200,000 kg·m/sleft. After thecollision the asteroid has a momentum of 800,000 kg·m/s right. After the collision, what is thecomet's momentum?