Momentum
What equation can be used to find momentum?
P=mV
What equation can be used to calculate the impulse of an object?
Ftrianglet=trianglep
What symbol is used to represent momentum?
P
What equation can be used to describe the momentum of objects before and after an elastic collision?
m1v1+m2v2=m1v1+m2v2
What equation can be used to describe the momentum of two objects in an inelastic collision?
m1v1+m2v2=mtotalvtotal
A 5 kg bowling ball is moving with a velocity of 10 m/s. What is the momentum of the bowling ball?
50 kg*m/s
A 6 kg bowling ball is moving with a velocity of 7 m/s. It hits a pin with a mass of 2 kg. After they collide, the bowling ball is at rest, and the bowling pin is now in motion. What is the change in momentum for the bowling ball?
-42 kg*m/s
Mass moving in a particular direction. (Mass in motion)
Momentum
A 5 kg bowling ball is moving with a velocity of 10 m/s. It hits a pin with a mass of 2 kg. After they collide, the bowling ball is at rest, and the bowling pin is now in motion. What is the velocity of the bowling pin after the collision?
25 m/s
A 5 kg bowling ball is moving with a velocity of 10 m/s. It hits a pin with a mass of 2 kg. After they collide, both objects move together. What is the velocity of the velocity of the objects together?
7.14 m/s
A beach ball has a mass of 0.1 kg. If it is moving at 23 m/s, what is the beach ball's momentum?
2.3 kg*m/s
How do crumple zones in cars help to reduce the amount of force on their passengers? Use the formula for impulse to defend your answer.
Increasing the change in time will reduce the force felt on impact.
When two or more objects collide, and one bounces off.
Elastic Collision
A beach ball has a mass of 0.25 kg, and moves at 100 m/s. It hits a small 25 kg child at rest. After the collision, the ball is at rest, and the child begins to move to the right. What is the child's velocity after the collision?
1 m/s
A beach ball has a mass of 0.25 kg, and moves at 100 m/s. It hits a small 25 kg child at rest, and they begin to move together. What is the velocity of the ball and child after impact?
0.99 m/s
A 236 kg wrecking ball swings with a velocity of 27 m/s. What is the momentum of the wrecking ball?
6372 kg*m/s
A 6 kg bowling ball is moving with a velocity of 7 m/s. It hits a pin with a mass of 2 kg. After they collide, the bowling ball is at rest, and the bowling pin is now in motion. The collision happens over the course of 0.2 seconds. With what force does the bowling ball hit the bowling pin?
210 N
The product of force and collision time
Impulse
A 236 kg wrecking ball swings with a velocity of 27 m/s. If the wrecking ball hits a 503 kg brick wall and the ball comes to rest, what will be the velocity of the wall be after the collision?
12.57 m/s
A 236 kg wrecking ball swings with a velocity of 27 m/s. If the wrecking ball hits a 305 kg wad of gum, and both keep swinging, what will be the velocity of the objects be after the collision?
11.78 m/s
A 369 kg wrecking ball swings with a velocity of 33 m/s. If the wrecking ball hits a wall, scattering many bricks, and the ball comes to a rest, what is the momentum of all the bricks together?
12,177 kg*m/s
Two 150 kg cars are traveling 50 m/s. Car A stops over the course of 5 seconds, and Car B stops over 20 seconds. Find the impulse of each car. Which one has more impulse?
-7500 kg*m/s for both. They both experienced the same change in momentum (aka impulse).
When two or more objects collide, and stick together
Inelastic Collision
A beach ball has a mass of 0.1 kg, and moves at 40 m/s. It hits a small 25 kg child moving at -5.5 m/s. If the beach ball bounces backwards at -23 m/s what is the velocity of the child after impact?
-5.25 m/s
A 3560 kg Ford F150 moving at 35 m/s strikes a clown car moving -5 m/s with a mass of 22 kg. They are stuck together after the collision. What is their velocity after the collision?
34.75 m/s