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Test (CST): Computer-Scored Unit Test
Total Questions: 25
Question 1
Depth Of Knowledge:
None
Bloom Level:
Application
Category:
Calculating Momentum
1a )
2543926
A dog of mass 18 kg runs at a speed of 4 m/s. What is the momentum of the dog?
#
Choice
Feedback
A.
4.5 kg•m/s
B.
18 kg•m/s
C.
36 kg•m/s
D.
72 kg•m/s
Correct!
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Incorrect Feedback
The correct answer is: 72 kg•m/s.

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1b )
2543927
A rat of mass 0.25 kg runs at a speed of 1.25 m/s. What is the momentum of the rat?
#
Choice
Feedback
A.
0.313 kg•m/s
Correct!
B.
0.875 kg•m/s
C.
1.0 kg•m/s
D.
5.0 kg•m/s
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Incorrect Feedback
The correct answer is: 0.313 kg•m/s.

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1c )
2543928
A cat of mass 1 kg runs at a speed of 2.5 m/s. What is the momentum of the cat?
#
Choice
Feedback
A.
0.4 kg•m/s
B.
1.0 kg•m/s
C.
2.5 kg•m/s
Correct!
D.
5.0 kg•m/s
Question 2
Depth Of Knowledge:
None
Bloom Level:
Application
Category:
Calculating Momentum
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Incorrect Feedback
The correct answer is: 2.5 kg•m/s.

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2a )
2543929
A skydiver has a mass of 61 kg. At what speed will she have a momentum of 3300 kg•m/s?
#
Choice
Feedback
A.
42.3 m/s
B.
54.1 m/s
Correct!
C.
61.9 m/s
D.
79.5 m/s
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Incorrect Feedback
The correct answer is: 54.1 m/s.

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2b )
2543930
A skydiver has a mass of 140 kg. At what speed will she have a momentum of 10,000 kg•m/s?
#
Choice
Feedback
A.
28.3 m/s
B.
31.2 m/s
C.
55.3 m/s
D.
71.4 m/s
Correct!
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Incorrect Feedback
The correct answer is: 71.4 m/s.

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2c )
2543931
A skydiver has a mass of 110 kg. At what speed will she have a momentum of 1000 kg•m/s?
#
Choice
Feedback
A.
2.1 m/s
B.
9.1 m/s
Correct!
C.
14.3 m/s
D.
28.6 m/s
Question 3
Depth Of Knowledge:
None
Bloom Level:
Application
Category:
Momentum and Impulse
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Incorrect Feedback
The correct answer is: 9.1 m/s.

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3a )
2543932
A bobsled has a momentum of 4000 kg•m/s to the south. Friction on the track reduces its
momentum to 2500 kg•m/s to the south. What impulse is applied to the bobsled by the friction?
#
Choice
Feedback
A.
1500 kg•m/s north
Correct!
B.
1500 kg•m/s south
C.
6500 kg•m/s north
D.
6500 kg•m/s south
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Incorrect Feedback
The correct answer is: 1500 kg•m/s north.

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3b )
2543933
A bobsled has a momentum of 3000 kg•m/s to the east. After the rider gives it a push, its
momentum increases to 5500 kg•m/s to the east. What impulse is applied to the bobsled?
#
Choice
Feedback
A.
2500 kg•m/s west
B.
2500 kg•m/s east
Correct!