Completion Complete each
statement.
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1.
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the tendency of an object to resist change in its motion
____________________
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2.
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the rate of change of velocity ____________________
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3.
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the distance traveled divided by the time it takes to travel that specific
distance ____________________
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4.
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a measure of how hard it is to stop an object ____________________
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5.
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speed plus direction ____________________
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6.
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the amount of matter in an object ____________________
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7.
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speed of an object at one instant of time ____________________
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Choose the best of the three choices in parentheses.
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8.
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The momentum of a falling leaf is ____________________ (greater than, less than,
equal to) the momentum of a falling pinecone.
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9.
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Two objects each have a mass of 70 kg. Their momentum is ____________________
(equal, changing, unknown).
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10.
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When two pool balls collide and move away from each other, they eventually stop.
This is because of ____________________ (momentum, friction, inertia).
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11.
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A 50 kg object moves with a velocity of 10 m/s. Its momentum is
____________________ (500 m/s2, 5 kg m/s, 500 kg m/s).
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Short Answer
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12.
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The velocity of an object goes from 4 m/s to 12 m/s in 4 s. What is its
acceleration?
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13.
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A 600 g toy car moving at 3 m/s collides and hooks up with a 900 g toy car at
rest and they move off together. What is their final velocity?
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Use each of the listed terms in a complete sentence.
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14.
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speed
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15.
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average speed
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16.
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velocity
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17.
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acceleration
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18.
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negative acceleration
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19.
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mass
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20.
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inertia
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21.
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momentum
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22.
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displacement
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23.
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law of conservation of momentum
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24.
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When objects collide, the total initial momentum equals the total final
momentum.
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Matching
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Match the terms with the correct phrase below. a. | kg m/s | d. | m/s | b. | m/s2 | e. | m | c. | kg |
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25.
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distance
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26.
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speed
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27.
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acceleration
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28.
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momentum
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29.
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mass
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Multiple Choice Identify the
choice that best completes the statement or answers the question.
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30.
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Two km south is a measure of ____.
a. | distance | c. | velocity | b. | displacement | d. | acceleration |
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31.
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A 10-kg object has a momentum of 50 kg m/s. Its velocity is ____.
a. | 10 m/s | c. | 5 m/s | b. | 5 m/s2 | d. | 500 m/s |
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32.
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An object’s inertia depends on its ____.
a. | mass | c. | momentum | b. | weight | d. | gravity |
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33.
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Momentum depends on ____ and ____.
a. | mass, weight | c. | velocity, weight | b. | weight, inertia | d. | mass, velocity |
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34.
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The hands of a clock ____.
a. | have a constant velocity | c. | constantly change
speed | b. | have no momentum | d. | are accelerating |
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Essay
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35.
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If an object moves at constant speed, can we assume that is not accelerating?
Explain.
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36.
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A car travels 10 km north, 5 km east, 15 km south, then 5 km north. a. | What is the distance it
travels? | b. | What is
its displacement? | | |
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37.
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An object’s velocity changes from 30 m/s to 23 m/s in 3 s. What is its
acceleration?
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38.
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A 5-kg object moving at 20 m/s collides with a 10-kg object moving a 5 m/s. They
stick together and move off together. What is their final velocity?
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39.
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You flew in an airplane from Denver to San Francisco, and your friend rode in a
car for the same trip. For which one of you would the displacement most nearly equal the distance?
Explain.
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40.
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You hear on a weather report that a tornado in a town near you is moving at 25
km/h. Is this enough information to know whether or not you are in danger? Explain.
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41.
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What is momentum and how does it differ from inertia?
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42.
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A tennis ball and a bowling ball have the same velocity. Which would be harder
to stop? Explain.
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43.
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How do you explain conservation of momentum when a rocket ship takes off?
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