4. The two sleds shown below are about to collide. If they stick together in the collision, what will happen after the collision? (In thiscollision, there is no friction between the sleds and the snow.)A.The two sleds will move to the left.B.The two sleds will move to the right.C.The two sleds will be motionless in the middle.D.There is not enough information to know which sled will be pushed backward.Correct Answer: B. The two sleds will move to the right. Explanation: After the collision, the sleds will move in the direction of the sled with more momentum. Momentum is equal to themass of the sled multiplied by its speed. Sled A has a momentum of . Sled B has amomentum of . Since sled A has more momentum, sled B will be pushed back after thecollision.
5. The two sleds shown below are about to collide. When they collide, they bounce off each other and no energy is lost. The kineticenergy of sled A is 39,561 J just after the collision. What is the kinetic energy of sled B after the collision? (Note: The potential energy ofeach sled after the collision is 0 J.)