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									Impulse and Momentum Quiz
 Linear Impulse and Momentum
 Angular Impulse and Momentum
 Conservation of Momentum
1. What are the correct SI units
for an angular impulse?
 a) N.s
 b) kg.m/s
 c) N.m.s
 d) kg.m/s2
2. If a 55.0 kg swimmer applies a
horizontal impulse of 300 N.s to
starting blocks, what is her
starting velocity?
 a) 4.36 m/s
 b) 53.5 m/s
 c) 30.6 m/s
 d) 5.45 m/s
3. If a person is motionless and
stops a positively spinning
flywheel that has a vertical axle,
the person will _______.
 a) stay motionless
 b) spin positively
 c) spin negatively
 d) become confused
4. What is the linear momentum of a
runner who weighs 500 newtons and
has a horizontal velocity of 8.00 m/s?

 a) 4000 kg.m/s
 b) 3920 kg.m/s
 c) 500 kg.m/s
 d) 408 kg.m/s
5. If a figure skater takes off with
an angular velocity of 5.0 rad/s and
I=15 kg.m2 and then reduces her I
to 8 kg.m2 what’s her final velocity?
 a) 9.38 rad/s
 b) 24.0 rad/s
 c) 5.00 rad/s
 d) 1.600 rad/s
6. A 100 gram arrow penetrates a
10-kg target and gives it a velocity
of 1.25 m/s. How fast was the arrow
before the impact?

 a) 125.0 m/s
 b) 100.0 m/s
 c) 126.3 m/s
 d) 115.0 m/s
Correct answers
  1)   c   (N.m.s or kg.m2/s)
  2)   d   (=300/55)
  3)   b   (spin positively)
  4)   d   (=[500/9.81] x 8.0)
  5)   a   (=[15 x 5] / 8)
  6)   c   (= [1.25 x 10.1] / 0.1)

								
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