Name:______________________________Class:__________________ Date:__________________
Assessment
Vibrations and Waves
Teacher Notes and Answers
11 Vibrations and Waves
SIMPLE HARMONIC MOTION
1. b
2. a
3. d
4. d
5. a
6. c
7. a
8. d
9. The system eventually stops oscillating and
comes to rest.
10. 43 N/m
Given
m = 370 g = 0.37 kg
x = 8.5 cm = 0.085 m
Solution
mg
k=
x
(0.37 kg)(9.81m/s2 )
k =
0.085m
k = 43 N/m
Original content Copyright © by Holt, Rinehart and Winston. Additions and changes to the original content are the responsibility of the instructor.
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Section Quizzes
Name:______________________________Class:__________________ Date:__________________
Assessment
Vibrations and Waves
Section Quiz: Simple Harmonic Motion
Write the letter of the correct answer in the space provided.
_____ 1. According to Hooke’s law, the force exerted by a spring on an object is
proportional to
a. the mass of the object.
b. the displacement of the spring.
c. the length of the spring.
d. the volume of the object.
_____ 2. In any system in simple harmonic motion, the restoring force acting on
the mass in the system is proportional to
a. displacement.
b. the length of a pendulum.
c. the mass.
d. frequency.
_____ 3. The spring constant in a given oscillating mass-spring may be
changed by
a. increasing the mass.
b. decreasing the mass.
c. decreasing the initial displacement.
d. none of the above
_____ 4. In an oscillating mass-spring system, the velocity of the mass is
greatest when the mass is
a. at the point of maximum displacement.
b. halfway between the equilibrium point and maximum displacement.
c. at the point where acceleration is greatest.
d. at the equilibrium point.
_____ 5. The period of a pendulum may be decreased by
a. shortening its length.
b. increasing the mass of the bob.
c. moving its equilibrium point.
d. decreasing the mass of the bob.
_____ 6. As the swinging bob of a pendulum moves farther from its equilibrium
position, the pendulum’s _______________ increases.
a. frequency
b. mass
c. restoring force
d. length
Original content Copyright © by Holt, Rinehart and Winston. Additions and changes to the original content are the responsibility of the instructor.
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Section Quizzes
Name:______________________________Class:__________________ Date:__________________
Vibrations and Waves continued
_____ 7. The gravitational potential energy of the bob of a swinging pendulum is
at its maximum when the bob is at
a. maximum displacement.
b. the equilibrium point.
c. the center of its swing.
d. minimum displacement.
_____ 8. Stretching a spring increases its ______________ energy.
a. mechanical kinetic
b. gravitational potential
c. vibrational kinetic
d. elastic potential
9. What happens to an oscillating mass-spring system as a result of damping?
_________________________________________________________________
_________________________________________________________________
10. What is the spring constant of a spring that stretches a distance of 8.5 cm when
a mass of 370 g is hung on it?
Original content Copyright © by Holt, Rinehart and Winston. Additions and changes to the original content are the responsibility of the instructor.
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Section Quizzes