Momentum
Impulse
Conservation of Momentum
Misc.
Misc. #2
100
A biker with a mass of 75 kg moves along the path with a constant velocity of 5 m/s. What is the biker's momentum?
375 kg*m/s
100
Cart A is pulled with a 2 Newton force for 2 seconds, and Cart B is pulled with a 1 Newton force for 3 seconds. Which cart experiences the greatest impulse?
Cart A
100
What does the law of conservation of momentum state?
Momentum before a collision is = to the momentum after a collision
100
A skateboarder increases her speed from 2 m/s to 4 m/s. What happens to her momentum?
Increases
100
What is the unit for momentum?
kg * m/sec
200
A runner has a momentum of 670 kg m/s and is travelling at a velocity of 9 m/s. What is his mass?
74.4 kg
200
An egg is thrown at a wall and at a bed sheet. The force of impact will be greatest in which scenario?
The wall
200
A billiard ball collides with a second ball and stops. The total momentum of the billiard balls:
Is the same before the collision
200
A roller coaster climbs up a hill at 4 m/s and then zips down the hill at 30 m/s.When is the momentum the greatest?
Down the hill, when speed is the greatest
200
Which of the following situations is an example of a visible change in momentum?
A hiker walks through a spider's web
A volleyball hits a mosquito in the air
A car drives over a pebble
A baseball is hit by a bat
The hiker and the baseball, #1 and #4
300
The momentum of an object depends upon the object's ___________&_____________.
Mass and velocity
300
What is the difference between a car hitting a wall vs. a car hitting a hay stack, in terms of impulse?
1. the Impulse on the car hitting the wall is greater
2. the change in momentum of the car hitting the wall is greater
3. the collision time of the car hitting the hay stack is greater
300
A 0.015 kg marble moving to the right at 0.225 m/s makes an elastic head-on collision with a 0.030 kg shooter marble moving to the left at -0.180 m/s. After the collision, the smaller marble moves to the left at -0.315 m/s. Assume that neither marble rotates before the collision and that both marbles are moving on a frictionless surface. What is the velocity of the 0.030 kg marble after the collision?
0.09 m/s
300
A large moving ball collides with a small stationary ball. The momentum....
of the large ball decreases, and the momentum of the small ball increases
of the small ball decreases, and the momentum of the large ball increases
of the large ball increases, and the momentum of the small ball decreases
does not change for either ball
A
300
Which of the following has the smallest amount of momentum?
1. A semi-truck traveling at highway speeds
2. A college track athlete running a race
3. A baby crawling on the floor
4. A student sitting at a desk
A student sitting at a desk, or #4
400
When the speed of an object is doubled, what happens to momentum?
Momentum is doubled
400
What is the purpose of crumble zones on a car?
1. Increase the time of impact
2. Decrease the impulse during impact
3. Decrease the force on the person in the car
4. Decrease the impulse on the person during a crash
400
A 7.05-kg ball rolls down the lane and it hits the 1.52-kg pin head-on. The ball was moving at 8.24 m/s before the collision. The pin went flying forward at 13.2 m/s. Determine the post-collision speed of the ball.
5.394 m/s
400
Which takes more force to catch, a bowling ball or a ping pong ball? Give a reason
bowling ball because it has more momentum
400
Which of the following has the largest amount of momentum?
1. A semi-truck traveling at highway speeds
2. A college track athlete running a race
3. A baby crawling on the floor
4. A student sitting at a desk
A semi-truck, or #1
500
Which of the following has the greatest momentum?
A tractor with a mass of 2,350 kilograms moving at a velocity of 26 m/sec
A boat with a mass of 1,310 kilograms moving at a velocity of 53 m/sec
A truck with a mass of 6,220 kilograms moving at a velocity of 11 m/sec
A car with a mass of 1,440 kilograms moving at a velocity of 39 m/sec
The boat, #2
500
How do airbags help reduce injury in car accidents?
By decreasing the time of impact on the person. The force is spread out over a longer period of time
500
A 0.16 kg pool ball sliding to the right at 8.0 m/s has an elastic head-on collision with another 0.16 kg pool ball initially at rest. If the first ball stops after the collision, what is the velocity of the second pool ball after the collision?
8 m/s
500
To increase the final momentum of a golf ball, a golfer should do what?
1. Increase the time of contact with the ball
2. swing as hard as possible
3. follow through when hitting the ball
500
If an egg is dropped on a cement sidewalk, it breaks. If an identical egg is dropped on a bed sheet suspended from the corners 0.5 m above the sidewalk, the egg does NOT break. Explain wh
By decreasing the time of impact on the egg. The force is spread out over a longer period of time