Period 3 Momentum Test Practice

20 Questions | Total Attempts: 75  Settings  • 1.
When objects collide, some momentum is lost
• A.

True

• B.

False

• 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?
• A.

4 m/s

• B.

8 m/s

• C.

12.5 m/s

• D.

20 m/s

• 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.
• A.

4,860 kg x m/s

• B.

4.86 kg x m/s

• C.

2.45 kg x m/s

• D.

10 kg x m/s

• E.

2,500 kg x m/s

• 5.
Choose all the possible units for momentum.
• A.

Kg m

• B.

N kg

• C.

Kg m/s

• D.

N s

• 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?
• A.

-10.5 m/s

• B.

10.5 m/s

• C.

7.2 m/s

• D.

-7.2 m/s

• 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...
• A.

Force/time

• B.

Force x time

• C.

Momentum

• D.

The change in momentum

• 9.
A bumper car (mass=150 kg) heads toward a wall going 7 m/s. What is its momentum?
• A.

21.4 kg m/s

• B.

350 kg m/s

• C.

175.6 kg m/s

• D.

220 kg m/s

• 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?
• A.

-37.5 N s

• B.

-350 N s

• C.

-150 N s

• D.

220 N s

• 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?
• A.

-37.5 N s

• B.

-350 N s

• C.

-150 N s

• D.

220 N s

• 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?
• A.

0 m/s

• B.

-3.4 m/s

• C.

-15 m/s

• D.

-6.75 m/s

• 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?
• A.

15.6 m/s

• B.

0 m/s

• C.

11 m/s

• D.

28 m/s

• 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?
• A.

10.5 m/s

• B.

-10.5 m/s

• C.

+6.7 m/s

• D.

-6.7 m/s

• 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.
• A.

Momentum

• B.

Velocities

• C.

Acceleration

• D.

Powers

• 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?
• A.

-6 m/s

• B.

6 m/s

• C.

-7.5 m/s

• D.

7.6 m/s

• 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?
• A.

-150 kg m/s

• B.

150 kg m/s

• C.

-300 kg m/s

• D.

300 kg m/s

• 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?
• A.

-150 kg m/s

• B.

150 kg m/s

• C.

-300 kg m/s

• D.

300 kg m/s

• 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?
• A.

-150 N

• B.

-300 N

• C.

-5 N

• D.

-75.6 N Back to top