10 of 12 nex Item 10 Part A A 65-cm-diameter about its center from 110 rpm to 30

Question

10 of 12 nex Item 10 Part A A 65-cm-diameter about its center from 110 rpm to 300 rpm in 5.0 wheel accelerates uniformly Determine its angular acceleration. Express your answer using two significant figures. rad/s2 Submit My Answers Give Up Part B Determine the radial component of the linear acceleration of a point on the edge of the wheel 2.0 s after it has started accelerating. Don't forget that the wheel has an initial angular velocity when it started accelerating. Express your answer using two significant figures. m/s Submit My Answers Give Up Part C Determine the tangential component of the linear acceleration of a

Explanation / Answer

a) w1 = 110 * 2pi/60 = 11.51 rad/s

w2 = 300 rpm = 31.41 rad/s

angular acceleration = w2 - w1 / t = 31.41 - 11.51 / 5

angular acceleration = 3.98 rad/s2

b) at t' = 2.0 s

w = w1 + alpha t' = 11.51 + (3.98 * 2) = 19.47 rad/s

ar = w2 * r = 19.472 * 0.325

= 123 m/s2

c) at = alpha * r = 3.98 * 0.325

= 1.29 m/s2

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