A dentist's drill starts from rest. After 3.00 s of constant angular acceleration it turns at a rate of 2.0 10^{4} rev/min.

α = (ω - ωo)/t α = (2 e4 rev/min)(2π rad/rev)(min / 60 s) / (3s) α = 698.13 rad/s^2 (b) θ = αt^2 / 2 θ = (698.13rad/s^2)(3 s)^2 / 2 θ = 3141.59 rad = 3.142 * 10^3 rad

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(b) is incorrect

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3141.59 rad

It can be written in different forms

3.142 * 10^3 or 31.42 * 10^2 rad

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