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Q.

A particle moves on the x-axis according to the equation x = x0 sin 2ωt. The motion is simple harmonic.

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a

With amplitude xo/2

b

With amplitude 2xo

c

With time period πω

d

With time period 2π/ω

answer is C.

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Detailed Solution

x = {x_0}sin 2omega t

At x = x0,

x0 = x0 sin 2ωt

Rightarrow sin 2omega t = 1

Rightarrow 2omega t = frac{pi }{2},left( {pi - frac{pi }{2}} right),left( {2pi + frac{pi }{2}} right),left( {3pi - frac{pi }{2}} right)....

therefore t = frac{pi }{{4omega }},frac{{5pi }}{{4omega }},frac{{9pi }}{{4omega }},frac{{11pi }}{{4omega }},....

therefore T = left( {frac{{5pi }}{{4omega }} - frac{pi }{{4omega }}} right) = left( {frac{{9pi }}{{4omega }} - frac{{5pi }}{{4omega }}} right) = left( {frac{{11pi }}{{4omega }} - frac{{9pi }}{{4omega }}} right) = ....

Rightarrow T = frac{pi }{omega }.

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