Physics Principles and Problems 2009

Section 14.1 : Periodic Motion

Self-Check Quizzes

1
Which is not an example of periodic motion?
A)vibrating guitar string
B)a rolling ball
C)clock pendulum
D)a swinging swing
2
When an object on a spring is at its equilibrium position, what is its acceleration?
A)a = kx2
B)zero
C)the upward force on the spring times displacement
D)mass times acceleration
3
What does the value of T in an oscillating spring depend on?
  Need a Hint?
A)mass of the object and the strength of the spring
B)the amplitude of the oscillations
C)the initial position of the object relative to Earth
D)number of coils in the spring and mass of the object
4
A pendulum with l = 37.2 cm has T = 1.21 s. Find the acceleration due to gravity.
A)g = 9.80 m/s2
B)g = 9.78 m/s2
C)g = 9.99 m/s2
D)g = 10.03 m/s2
5
Resonance causes _____.
A)the net force in a simple harmonic motion to change direction
B)oscillations to reach equilibrium
C)large-amplitude oscillations
D)gravity to act upon a weight on a spring
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