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An airplane propeller is rotating at 1900 rpm (rev/min).
(a) Compute the propeller’s angular velocity in rad/s.
(b) How many seconds does it take for the propeller to turn through 35 ^ { \circ }35 ∘ ?

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Answer:

See explanation

Explanation:

We have to convert to angular velocity in rads-1 as follows;

Angular velocity in rad/s = 2π/60 × 1900 rpm = 199 rad/s

Given that

angular velocity =angle turned /time taken

Time taken = angle turned/angular velocity

Converting 35° to radians we have;

35 × π/180 = 0.61 radians

Time taken = 0.61 radians/199 rad/s

Time taken = 0.0031 seconds

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