An object of mass m is moving in unifrom circular motion in xy-plane. The circle has radius R and object is moving clockwise around the circle with speed v. The motion is projected onto the x-axis where it appears as simple harmonic motion accoding to `x(t) = Rcos (omegat + phi)`. The motion starts from pointof coordinates `(0,R)`. In this projection `phi` is-A. `pi//2`B. `pi`C. `3pi//2`D. `0`

An object of mass m is moving in unifrom circular motion in xy-plane.

1.	An object of mass m is moving in unifrom circular motion in xy-plane. The circle has radius R and object is moving clockwise around the circle with speed v. The motion is projected onto the x-axis where it appears as simple harmonic motion accoding to `x(t) = Rcos (omegat + phi)`. The motion starts from pointof coordinates `(0,R)`. In this projection `phi` is-A. `pi//2`B. `pi`C. `3pi//2`D. `0`
Answer» Correct Answer - C At `t = 0, x = 0 , v = v_(0) = omegaR` so `cos(omegat + phi) = 0` & `-sin(omegat+phi) = +1 rArr phi = (3pi)/(2)`

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