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Question: Derive a relation between linear and angular velocities.


Let a particle is moving along a circle. If the initial position of the particle is at A and after a small interval of time ∆t, it reaches point B describing angle ∆θ. The linear displacement is equal to the length of arc AB = ∆s.

∆s is resulted due to the linear velocity of the particle which is along the tangent to the circumference of the circle. We know that ∆s = r ∆θ. Dividing both sides by ∆t,

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