Multiple Choice Problem 9.13 A disk starts from rest and rotates with constant a

Question

Multiple Choice Problem 9.13 A disk starts from rest and rotates with constant angular acceleration. Part A If the angular velocity is ? at the end of the first two revolutions, then at the end of the first eighteen revolutions it will be If the angular velocity is at the end of the first two revolutions, then at the end of the first eighteen revolutions it will be 3? . 18? . 9? . ?. Multiple Choice Problem 9.13 A disk starts from rest and rotates with constant angular acceleration. Multiple Choice Problem 9.13 A disk starts from rest and rotates with constant angular acceleration. A disk starts from rest and rotates with constant angular acceleration. A disk starts from rest and rotates with constant angular acceleration. Part A If the angular velocity is ? at the end of the first two revolutions, then at the end of the first eighteen revolutions it will be 3? . 18? . 9? . ?.

Explanation / Answer

w^2 = 2*alpha*theta

Since alpha is constant, w^2 is proportional to theta.

w^2 / 2 = x^2 / 18

x = 3w

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