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It would be very good if someone explained me how do you get to the final answer which is already know (3.2 rad/s^2)

Have been given: ω = 20 = angular velocity (rad/s) N = 10 full spins Need to find: α = angular acceleration (rad/s^2)

Problem: Evenly accelerationg wheel gets 20 rad / s After N = 10 spins from beginning of the movement. Calculate the angular acceleration of the wheel.

Thank you.

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1 Answer

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Impossible. rpm-s are revolutions per minute, so it is just another measure of angular velocity (one revolution equals 2 Pi radians, minute equals 60 seconds). Also 20 rad/s can't be equal to 10 rpm. May be you have a time during which the rotation speeded up from 10 rpm to 20 rad/s?

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Sorry I didnt explay problem correctly... – enflam3 Feb 7 '12 at 21:43

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