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Question

The motion of a particle varies with time according to the relation y=asinωt+acosωt . Then

A
the motion is oscillatory but not SHM
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B
the motion is SHM with amplitude a
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C
the motion is SHM with amplitude a 2
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D
the motion is SHM with amplitude a2
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Solution

The correct option is D the motion is SHM with amplitude a 2
y=a sin ωt+a cos ωt
=a2sin(ωt+R4)
Clearly amplitude is a2 and motion is SHM.
because a=d2ydt2=a2ω2sin(ωt+R4)
So, a is proportion to ω2 ,which is the condition of SHM.

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