第九章单元测试
- An oscillator takes 10s for 5 revolutions. What is the angular frequency of this oscillation.（ ）
- In spring-block system (spring constant
and mass 
), what is the frequency for simple harmonic motion. （ ） - For a simple harmonic motion
, which of the following statements are correct. （ ） - For simple harmonic motion in x direction, which of the following statements are correct. （ ）
- The equation of oscillations can only be expressed as trigonometric functions. （ ）
A:
B:
C:
D:
答案:
A:
B:
C:
D:
A:phase angle
gives the initial position of the oscillation
B:the displacement and velocity can reach the maximum simultaneously
C:Amplitude 
is independent on 
and 
D:angular frequency 
is related to period
A:uniform circular motion can be used for interpretation B:the restoring force
C:kinetic energy is always smaller than potential energy
D:the mechanical energy is conserved
A:对 B:错
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