# Velocity and Acceleration of a Particle Moving With Simple Harmonic Motion

For Velocity and Acceleration of a Particle Moving With Simple Harmonic Motion (SHM), consider a particle, moving round the circumference of a circle of radius r, with a uniform angular velocity Ï‰ rad/s, as shown in Fig. 1.32. Let P be any position of the particle after t seconds and Î¸ be the angle turned by the particle in t seconds. We know that

Î¸ = Ï‰.t, and    x = rcosÎ¸ = rcosÏ‰t

The velocity of N (which is the projection of P on XX') is the component of the velocity of P parallel to XX'.

VN = v sinÎ¸ = Ï‰.rsinÎ¸

The velocity is maximum, when x = 0, i.e. when N passes through O (i.e. mean position).

vmax = Ï‰.r

The acceleration of N is the component of the acceleration of P parallel to XX' and is directed
towards the center O.

The acceleration is maximum, when x = r, i.e. when P is at X or X'.

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#### 1 comment:

1. Without being wierd I would say, a diagram to go along will be much helpful.