Imagine that you are in a room and there is a door you want to close. The building is a little biton fire, and there is a fire on the hallway, so you want to close the door to keep the fire on thehallway from coming in the room, but you don’t want to get close.Finding two balls of same mass in the room. One of the balls will stick to the door the other onewill bounce.Which one do you want to throw to the door to impact the max P to the door?
Question
Imagine that you are in a room and there is a door you want to close. The building is a little biton fire, and there is a fire on the hallway, so you want to close the door to keep the fire on thehallway from coming in the room, but you don’t want to get close.Finding two balls of same mass in the room. One of the balls will stick to the door the other onewill bounce.Which one do you want to throw to the door to impact the max P to the door?
Solution
To maximize the impact (P) on the door, you would want to throw the ball that bounces.
Here's why:
When you throw a ball at the door, it imparts momentum to the door. The momentum (P) of an object is given by the product of its mass (m) and velocity (v), i.e., P = mv.
When a ball hits the door and sticks to it, it imparts a certain amount of momentum to the door. This is equal to the momentum it had just before it hit the door.
However, when a ball hits the door and bounces back, it not only gives its momentum to the door, but also takes some momentum in the opposite direction. This effectively doubles the change in momentum imparted to the door.
So, if you want to maximize the impact on the door, you should throw the ball that bounces.
Similar Questions
A 0.280-kg ball makes an elastic head-on collision with a second ball initially at rest. The second ball moves off with one-fourth the original speed of the first ball. The mass of the second ball is
Charlie throws a ball up into the air. While the ball is airborne, which is the greatest force acting on the ball to slow it down?
The two metal balls of the previous question roll off a horizontal table with the same speed. In this situation:Group of answer choicesboth balls hit the floor at approximately the same horizontal distance from the base of the table.the heavier ball hits the floor at about half the horizontal distance from the base of the table than does the lighter ball.the lighter ball hits the floor at about half the horizontal distance from the base of the table than does the heavier ball.the heavier ball hits the floor considerably closer to the base of the table than the lighter ball, but not necessarily half the distance.the lighter ball hits the floor considerably closer to the base of the table than the heavier ball, but not necessarily half the distance.
Multiple Select QuestionSelect all that applyIn applying the law of conservation of momentum to collisions, which of the following can occur? Note that the objects do not stick on impact.Multiple select question.If the target object has less mass, then the incoming object will continue in its original direction after the impact but with increased speed.If the two objects have the same mass, the incoming object stops and the target object moves off with the same speed that the incoming one had.If the target object has more mass, the incoming object bounces off the heavier target and they move apart in opposite directions.If the two objects have the same mass, the incoming object continues in the opposite direction after impact but with reduced speed.
A ball of mass m is dropped from a height H above a level floor asshown in figure. After striking the ground it bounces off back andreaches up to height h.Based on above information, answer the following questions: H hm13. Change in momentum of the ball on striking is
Upgrade your grade with Knowee
Get personalized homework help. Review tough concepts in more detail, or go deeper into your topic by exploring other relevant questions.