Download Chapter 11 Test

Name ________________________
Date _________________________
Block ________________________
Chapter 11 Test
Multiple Choice
Identify the choice that best completes the statement or answers the question.
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1. Which of the following is not a factor in calculating momentum?
a. mass
c. acceleration
b. direction
d. speed
2. If you divide momentum by velocity, the result is the value of the object’s
a. mass.
c. energy.
b. direction.
d. speed.
3. Whenever an object is standing still, the value(s) that is/are always zero is/are
a. speed.
c. momentum.
b. velocity.
d. All of the above
4. The law that states that every object maintains constant velocity unless acted on by an unbalanced force is
a. Newton’s first law of motion.
c. Newton’s third law of motion.
b. Newton’s second law of motion.
d. the law of conservation of momentum.
5. The law that states that for every action force there is an equal and opposite reaction force is
a. Newton’s first law of motion.
c. Newton’s third law of motion.
b. Newton’s second law of motion.
d. the law of conservation of momentum.
6. The law that states that the unbalanced force acting on an object equals the object’s mass times its
acceleration is
a. Newton’s first law of motion.
c. Newton’s third law of motion.
b. Newton’s second law of motion.
d. the law of conservation of momentum.
7. The SI unit of force, named for the scientist who described the relationship between motion and force, is
called the
a. newton.
c. curie.
b. einstein.
d. pasteur.
8. Which of the following units is used to measure acceleration in free fall?
a. m/s
c. m/s2
b. m  s
d. m2/s2
9. Which statement about action-reaction forces is incorrect?
a. There are always two of them.
c. They always act on the same object.
b. They are always equal.
d. They always occur at the same time.
10. Which object does not have momentum?
a. a fish swimming in a pond
c. a rock by the side of the road
b. a feather falling to the ground
d. a boulder rolling down a hill
11. What is the reaction force when you place a cup on a table?
a. the force of the cup on the table
c. the force of gravity on the table
b. the force of the table on the cup
d. the force of gravity on the cup
12. Earth pulls on the moon and holds the moon in its orbit. The moon pulls on Earth with an equal and
opposite force. This is an example of
a. Newton’s first law.
c. Newton’s third law.
b. Newton’s second law.
d. None of the above
13. What is the unbalanced force that slows down a ball rolling across the floor?
a. the force of friction
c. the force of inertia
b. the force of gravity
d. the force of momentum
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Name ________________________
Date _________________________
Block ________________________
____ 14. If two objects with different masses and traveling with different velocities collide, what law allows you to
predict the motion of the objects after the collision?
a. the law of conservation of momentum
c. Newton’s third law
b. the law of universal gravitation
d. Newton’s second law
____ 15. Express the following as an equation: One newton is the force that can give an object with a mass of 1 kg
an acceleration of 1 m/s2.
a. 1 N = 1 kg ÷ 1 m/s2
c. 1 N = 1 m/s2 ÷ 1 kg
2
b. 1 N  1 kg = 1 m/s
d. 1 N = 1 kg  1 m/s2
____ 16. Bonus: When air resistance balances the weight of an object that is falling, the velocity
a. slowly decreases.
c. rapidly increases.
b. remains constant.
d. None of the above
____ 17. Bonus: When gravitational forces and air resistance equalize on an object that is falling toward Earth and
the object stops accelerating, what is the velocity of an object called?
a. resultant velocity
c. instantaneous velocity
b. terminal velocity
d. average velocity
Completion
Complete each statement with a word from the “Word Choices.”
Word Choices:
Momentum
Force
Mass
Velocity
Acceleration
Inertia
Less
Greater
18. Mass times velocity equals ____________________.
19. According to Newton’s second law of motion, force is the product of ____________________ and
____________________.
20. The tendency of an object at rest to remain at rest, or if moving, to continue moving at a constant velocity
is ____________________.
21. An object with a small mass has ____________________ inertia than an object with a large mass.
Short Answer
22. Two identical cars traveling at equal speeds in opposite directions collide head-on. They stick together
after the collision. How fast are the cars moving immediately after the collision?
23. A man is standing on a log that is floating in a river. He jumps forward off the log and into the water.
Describe the motion of the log.
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Name ________________________
Date _________________________
Block ________________________
Problem
Formulas:
1) p = m v, 2) v = p / m, 3) m = p / v, 4) F = m a, 5) a = F / m, 6) m = F / a
Show your work:
1) Formula, 2) Substitution, 3) Answer, 4) Units
24. A large truck loaded with scrap steel weighs 14 metric tons and is traveling north on the interstate heading
for Chicago. It has been averaging 48 km/h for the journey and has traveled over 1450 km so far. It has
just stopped to refuel. What is its current momentum?
25. What is the velocity of a 16 kg penguin that has a momentum of 88 kg*m/s?
26. What is the mass of a frozen chicken flying from a cannon with a momentum of 159 kg*m/s if the
chicken’s velocity is 50 m/s?
27. A box is sliding along a level floor under an unbalanced frictional force of 1.125 N. It is slowing down
at a rate of 0.45 m/s2. What is the mass of the box?
28. Calculate the horizontal force that must be applied to a 1300 kg vehicle to give it an acceleration of 2.6
m/s2 on a level road.
29. The net force acting on a 5 kg discus is 60 N. What is the acceleration of the discus?
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