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Questions  

Three simple harmonic motions of equal amplitudes A and equal time periods along the same line combine. The phase of the second motion is 60° ahead of the first and phase of the third motion is 60° ahead of the second. The amplitude of resultant motion is

a
3A
b
22 A
c
3  A
d
2A

detailed solution

Correct option is D

The resultant of three vectors shown in the figure is 2A (along the direction of 2).

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