Physical Science
3.1 Quiz
Newton’s Second Law
VOCABULARY—Fill in the blank with the appropriate word or words.
1. __________________________________________________________ states that the acceleration of an object is in the same
direction as the net force on the object.
2. A force that opposes the motion of objects that move through air is
_____________________________________________________________.
3. A type of friction that opposes the motion of two surfaces slipping past one another is
________________________________________________________.
4. A force that opposes the motion of two surfaces touching is ______________________________________________.
5. A type of friction that prevents two surfaces from sliding across one another (keeps them stuck together) is
__________________________________________________.
CONCEPTS—Answer in complete sentences unless answer is fill-in-the-blank.
6. Explain the relationship of net force, mass, and acceleration as it pertains to Newton’s Second Law of Motion. You may use an
example of, say, a ball, to help explain.
____________________________________________________________________________________________________________
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Apply Newton’s Second Law: You may use a calculator if you wish.
7. A runner has a mass of 89 kilograms. He produces a force of 84 Newtons between the ground and his running shoes. How fast
does he accelerate?
8. If a motorcycle with a mass of 900 kg is expected to accelerate 32.0 m/s2, how much force will it take?
9. The Space Shuttle has a liftoff mass of 2,041,000 kg and accelerates at a rate of 16 m/s2. Calculate the force that is accelerating
the Space Shuttle.
10. What does the force of friction between two objects in contact depend on?
____________________________________________________________________________________________________________
____________________________________________________________________________________________________________
11. On a seemingly smooth surface, what causes friction?
____________________________________________________________________________________________________________
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12. Give an example of each of the three types of friction discussed in the book. Use examples that you would encounter on any
day.
A.__________________________________________________________________________________________________________
B.__________________________________________________________________________________________________________
C.__________________________________________________________________________________________________________
13. If it weren’t for the air being held by gravity around Earth, what would happen when you dropped a feather and a rock to Earth
with the same gravity, but NO air?
____________________________________________________________________________________________________________
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14. The amount of air resistance on an object depends on what three things?
____________________________________________________________________________________________________________
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15. The rate of acceleration due to gravity on Earth is ______________ m/s 2.
16. Explain how terminal velocity affects an object falling to Earth.
____________________________________________________________________________________________________________
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17. What three things does terminal velocity depend on (not the same as air resistance)?
____________________________________________________________________________________________________________
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18. Another type of friction is fluid friction (not mentioned in the book). Give an example of how a fluid is used to reduce friction in
a car.
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