In a similar way we can relate the angular velocities of the mass at times separated.By time, δ t i.e. The new velocity will be different from the old value by an amount.Equal to δ t *, ¨ θ (T), where ¨ θ. (T) is the angular acceleration (CF. The familiar expression.V = u + at for linear motion). The acceleration also varies with time and so again.We will use its average value during the time interval δ t. For the evaluation of.˙ θ. (T + δ T / 2) this translates to.
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