First slide
Simple hormonic motion

The radius of circle, the period of revolution, initial position and sense of revolution are indicated in the figure. y -projection of the radius vector of rotating particle P is


 Here T=4 s,A=3 m  Time period T=2πω4=2πωω=π2  When the time is noted from the extreme position, then  y=Acos(ωt)y=3cosπ2t

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