Equation of a simple harmonic motion is given as x=3 sin 20 πt+4 cos 20πt where x is in cms and t in seconds. The amplitude is:

Equation of a simple harmonic motion is given as x=3 sin 20 πt+4 cos 20πt where x is in cms and t in seconds. The amplitude is:

  1. A

    7 cm

  2. B

    4 cm

  3. C

    5 cm

  4. D

    3 cm

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    Solution:

    x=3 sin  20πt+4 cos 20πt=535sin 20πt+45cos 20 πt   =5 sin 20 πt+53o, amplitude = 5 cm 

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