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- 1. Multiple Choice
An object that has momentum can be described as _________
changing its velocity
moving fast
resisting changes in its state of motion
having its mass in motion
encountering a net force
- 2. Multiple Choice
Which one of these objects has the greater amount of momentum?
A turtle that slowly crosses a road
A parked car
A stop sign
- 3. Multiple Choice
Which one of the following units represents the standard metric units of momentum
Newtons * meter / second
Kilograms * meter / second2
meter / second
Kilograms * meter / second
- 4. Multiple Choice
Which one of the following units represents the standard metric units of impulse
Kilograms * meter / second2
Newton * meter
meter / second2
Newton * second
- 5. Multiple Choice
During a collision. an object experiences an impulse. How can this impulse be calculated?
Multiplying force by time
Multiplying mass by velocity
Dividing velocity by time
Multiplying mass by acceleration
- 6. Multiple Choice
During a collision. an object experiences an impulse. The impulse causes and is equal to the _____ of the object
energy change
kinetic energy change
force
momentum
momentum change
- 7. Multiple Choice
When a cannon fires a cannon ball, it recoils backwards. This occurs because of...
Energy in the system is conserved
Energy in the system is increased
Momentum in the system is conserved
Energy in the system is not conserved
- 8. Multiple Choice
A freight car of mass 20,000kg moves along a track at 15 m/s. What is the momentum of the car?
30,000 kg*m/s
3,000 kg*m/s
300,000 kg*m/s
3,000,000 kg*m/s
- 9. Multiple Choice
A 2kg object moving at 5 m/s encounters a 30 N resistive force over a duration of 0.10 seconds. The impulse experienced by this object is _____
0.30 N*s
2 N*s
2.5 N*s
3 N*s
7 N*s
- 10. Multiple Choice
A football player is running north down the field, and has a momentum of 120 kg*m/s. He experience a southward impulse of 200 N*s. What is the final momentum of the player
80 kg*m/s north
80 kg*m/s south
320 kg*m/s north
320 kg*m/s south
- 11. Multiple Choice
A 40 kg object has an eastward momentum of 360 kg*m/s. The object encounters a westward impulse of
120 N*s. What is its final velocity?
3 m/s west
6 m/s east
9 m/s west
12 m/s east
- 12. Multiple Choice
An egg landing on a soft surface will remain intact. The surface increases the _____ and decreases the _____ during the impact
impulse, time
impulse, force
force, time
time, force
- 13. Multiple Choice
A 5kg ball has a momentum of 30 kg*m/s. What is the speed of the ball
150 m/s
35 m/s
6 m/s
5 m/s
- 14. Multiple Choice
Padded dashboards in cars are safer in accidents than non padded ones because the passenger hitting the dash has...
a) Increased time of impact
b) decreased impulse
c) decreased impact force
d) a and b
e) a and c
- 15. Multiple Choice
A small fish is at rest. A big fish, with 4 times the mass and a speed of 20 cm/s swallows the small fish. What is the new speed of the fish?
20 cm/s
16 cm/s
5 cm/s
25 cm/s
80 cm/s
- 16. Multiple Choice
Before objects A and B collide, A has a momentum of 26 kg*m/s and B has a momentum of -14 kg*m/s. After the collision, A has a momentum of 8 kg*m/s. B has a momentum of..
2 kg*m/s
4 kg*m/s
6 kg*m/s
12 kg*m/s
32 kg*m/s
- 17. Multiple Choice
A 10 kg object moves at 2 m/s to the right and collides with a 4 kg object moving at 5 m/s to the left. The total momentum is_____
20 kg*m/s
40 kg*m/s
10 kg*m/s
30 kg*m/s
0 kg*m/s
- 18. Multiple Choice
In an elastic collision...
objects bounce off each other
objects stick together
objects stick together for a while then separate
one object flips over the other
- 19. Multiple Choice
In an elastic collision...
only momentum is conserved
only energy is conserved
both momentum and energy are conserved
neither momentum nor energy are conserved
- 20. Multiple Choice
In a completely inelastic collision...
objects bounce off each other
objects stick together
objects stick together for a while then separate
one object flips over the other
- 21. Multiple Choice
In a completely inelastic collision...
only momentum is conserved
only energy is conserved
both momentum and energy are conserved
neither momentum nor energy are conserved
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