1.
When objects collide, some momentum is lost
2.
Elastic collision is
A.
Objects that collide and stick together
B.
Objects that collide and bounce off of each other
C.
Objects that collide and decrease their velocity
3.
A truck with a mass of 1500 kg is traveling east on a road, going 20 m/s. It has a head on collision with a car (mass=1000) going 20 m/s west. Afterward, the two automobiles are stuck together. What is their velocity?
4.
A cannon fires a 40.5kg shell toward a target and the shell moves with a velocity of 120m/s. Calculate the shell's momentum.
5.
Choose all the possible units for momentum.
6.
A male and female ice skater are practicing together. The male has a mass of 60 kg and is moving 6 m/s on the ice when he accidentally has a head on collision with female skater (who has a mass of 50 kg). They are both brought to a sudden stop. What was her original velocity?
7.
Is momentum a vector?
A.
Yes, its direction matters.
B.
No, its direction matters
C.
Yes, its direction doesn't matter
D.
No, its direction doesn't matter
8.
Choose ALL that apply!!!
Impulse is equal to...
9.
A bumper car (mass=150 kg) heads toward a wall going 7 m/s. What is its momentum?
10.
A bumper car (mass=150 kg) heads toward a wall going 7 m/s. When it hits the wall, a force of -75 N is applied to it for 0.5 s. What is the impulse on the bumper car?
11.
A bumper car (mass=150 kg) heads toward a wall going 7 m/s. When it hits the wall, a force of -75 N is applied to it for 0.5 s. What is the change in momentum on the bumper car?
12.
A bumper car (mass=150 kg) heads toward a wall going 7 m/s. When it hits the wall, a force of -75 N is applied to it for 0.5 s. What is the new velocity of the car?
13.
Two tug boats have the same mass (20,000 kg). The Jolly Roger is driving too fast (11 m/s) when it runs into the Happy Mermaid, which is only going 8 m/s. Afterward the Jolly Roger is moving backward going 9 m/s. How fast is the Happy Mermaid going?
14.
Two aliens are playing on hovercrafts. The big blue one has a mass of 30 kg (including her hovercraft). The little pink one has a mass of 20 kg (including his hovercraft). Originally at rest, they push off one another. The velocity of the blue alien is now 6.7 m/s. What is the velocity of the pink alien?
15.
Engineers try to design cars that will allow people to survive high velocity impacts. To do this, the try to...
A.
Increase the change in momentum, causing a decrease in the force of impact.
B.
Decrease the impulse on the people, by altering the force and time acting on them.
C.
Increase the time it takes for the people to come to a stop, hence decreasing the force.
D.
Decrease the change in momentum the people would feel in the collision.
16.
In a closed and isolated system, the sum of all the individual ______________ remains constant.
17.
A big goat and a little goat are in an epic battle. The big goat has a mass of 25 kg and a velocity of 6 m/s. The smaller goat (mass=20 kg) is rushing right toward him. Smash! They bang heads, coming to a complete stop. What was the original velocity of the little goat?
18.
A big goat and a little goat are in an epic battle. The big goat has a mass of 25 kg and a velocity of 6 m/s. The smaller goat (mass=20 kg) is rushing right toward him. Smash! They bang heads, coming to a complete stop. What was the change in momentum of the big goat?
19.
A big goat and a little goat are in an epic battle. The big goat has a mass of 25 kg and a velocity of 6 m/s. The smaller goat (mass=20 kg) is rushing right toward him. Smash! They bang heads, coming to a complete stop. What was the impulse on the big goat?
20.
A big goat and a little goat are in an epic battle. The big goat has a mass of 25 kg and a velocity of 6 m/s. The smaller goat (mass=20 kg) is rushing right toward him. Smash! They bang heads, coming to a complete stop.The goats come to a stop in 0.5 seconds. What was the force on the big goat's head?