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# a) The rotor of a helicopter is gaining angular speed with constant angular acceleration. At t...

a) The rotor of a helicopter is gaining angular speed with constant angular acceleration. At t = 0 it is rotating at 1.25 rad/s. From t = 0 to t = 2.00 s, the rotor rotates through 8.00 rad. What is the angular acceleration of the rotor?

b) Through what angle (in radians) does the rotor rotate from t = 0 to t = 4.00 s? in radians

c) Shortly after a vinyl record (radius 0.152 m) starts rotating on a turntable, its angular velocity is 1.60 rad/s and increasing at a rate of 8.00 rad/s2. At this instant, for a point at the rim of the record, what is the tangential component of acceleration?

d) At this instant, for a point at the rim of the record, what is the centripetal component of acceleration?

e) At this instant, for a point at the rim of the record, what is the magnitude of acceleration? #### Earn Coins

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