Periodic Motion Multiple Questions and Answers.




1.The displacement of an object attached to a spring and executing simple harmonic motion is given by x = 2×10-2 cosπt(in m). The time at which the maximum speed first occurs is?
A. 0.5s
B. 0.75s
C. 0.125s
D. 0.25s

2.The maximum velocity of a particle, executing simple harmonic motion with amplitude 7mm, is 4.4m/s. The period of oscillation is?
A. 0.01s
B. 0.1s
C. 10s
D. 100s

3.If the frequency of oscillation of a particle doing simple harmonic motion is n, the frequency of kinetic energy is?
A. 2n
B. n
C. n/2
D. 2/n

4.Natural length of spring is 60 cm and its spring constant is 4000 N/m. A mass of 20 kg is hung from it. The extension produced in the spring (take g=9.8m/s2) is?
A. 4.9cm
B. 0.49cm
C. 9.4cm
D. 0.94cm

5.The phase difference between the instantaneous velocity and acceleration of a particle executing simple harmonic motion is?
A. 0.5Ï€
B. π
C. 0.707 π
D. 0.61 π

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