A 0.15 m radius grinding wheel, starting from rest, developesan angular velocity

Question

A 0.15 m radius grinding wheel, starting from rest, developesan angular velocity of 12 rad/s in a time interaval of 4sec. Whatis the average wheel angular acceleration? a. 96 rad/s/s b. 48 rad/s/s c. 3 rad/s/s d. .33 rads/s Which answer is correct and can someone show me thesteps? A 0.15 m radius grinding wheel, starting from rest, developesan angular velocity of 12 rad/s in a time interaval of 4sec. Whatis the average wheel angular acceleration? a. 96 rad/s/s b. 48 rad/s/s c. 3 rad/s/s d. .33 rads/s Which answer is correct and can someone show me thesteps?

Explanation / Answer

wheel angular acceleration = ( W ' - W ) /T where w ' = final angular speed = 12 rad / s            w = initial angular speed = 0 rad / s            t = time = 4 s substitue values we get = 3 rad / s ^2

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