create a post back to my classmate destini Reply from Destini Johnson 1. Even though momentum is conserved, moving objects eventually slow down because of forces like friction and air resistance. These forces act in the opposite direction of motion and cause the object's momentum to decrease, even though momentum itself would stay constant in a truly isolated system. 2. If a light object and a heavy object have the same kinetic energy, the light one must be moving faster. Since momentum depends on both mass and velocity, the heavier object has the greater momentum even though their kinetic energies are equal. 3. When you release an inflated but untied balloon, the air rushes out in one direction. The escaping air pushes the balloon in the opposite direction, causing it to zoom randomly around the room. This is called conservation of momentum. 4. When the boy dives off the back of the rowboat, he pushes the boat in the opposite direction. The momentum of the boy and the boat together is conserved, so as the boy moves forward, the boat moves backward slightly. 5. The rich man on the frozen lake couldn't move because there was no friction for him to push against. He could have saved himself by throwing the bag of gold coins in the opposite direction he wanted to go. The momentum from throwing the coins would push his body toward the shore