Problen 1: A disk at rest experiences a constant angular acceleration for 65 s,

Question

Problen 1: A disk at rest experiences a constant angular acceleration for 65 s, at the end of which it is spinning with a frequency off= 65 rpm. Please answer the following questions Randomized Variables t65 s f65 rpm Part (a) Write an expression for the magnitude of the angular velocity of the disk after the acceleration in terms of the frequency Expression: Select from the variables below to write your expression. Note that all variables may not be required Part (b) Calculate the magnitude of the angular velocity of the disk in rad/s at time t Numeric A numeric value is expected and not an expression. 65 s Part (c) Write an expression for the average angular acceleration of the disk ?(ve in terms of angular velocity Expression' (t ne Select from the variables below to write your expression. Note that all variables may not be required Part (d) Calculate the magnitude of the average angular acceleration of the disk ?(ne from rest to Numeric A numeric value is expected and not an expression 65 s in rads". we Part (e) Write an expression for the period T of the disk in terms of frequency f. Expression Select from the variables below to write your expression. Note that all variables may not be required. Part (f) Calculate the magnitude of the period of the disk T at time Numeric A numeric value is expected and not an expression. 65 s in seconds

Explanation / Answer

a] w = 2pi f

b] w = 2pi*65/60 = 6.81 rad/s

c] alpha = [w - w0]/t

d] alpha = 6.81/65 = 0.105 rad/s^2

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