ular acceleration of 7.9 rad A disk of radius 10 cm, Initially at rest, begins r
ID: 1585314 • Letter: U
Question
ular acceleration of 7.9 rad A disk of radius 10 cm, Initially at rest, begins rotating about its axts with a constant What are the following values at t-8s a 1) (a) the angular velocity of the disk rad/s You currently have O submissions for this questlon. Only 10 subnission are allowed You can make 10 more submissions for this question 2) (b) the tangential acceleration a and the centripetal acceleration a of a point at the edge of the disk m/st Submit You currently have O submissions for thits question. Only 10 submission are allowed You can make 10 more submissions for this question. m/s Submit You currently have 0 submissions for this question. Only 10 submission are allowed You can make 10 more submfssions for this question.Explanation / Answer
Given,
r = 10 cm ; alpha = 7.9 rad/s^2 ; t = 8
a)We know from eqn in circular motion:
w = w0 + alpha t
w = 0 + 7.9 x 8 = 63.2 rad/s
Hence, w = 63.2 rad/s
b)a(T) = alpha R
a = 7.9 x 0.1 = 0.79 m/s^2
Hence, a(T) = 0.79 m/s^2
a(c) = v^2/R = w^2 R^2/R = w^2 R
a(c) = 63.2^2 x 0.10 = 399.42 m/s^2
Hence, a(c) = 399.42 m/s^2
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