Radial & Tangential Acceleration for Non Uniform Circular Motion
A ceiling fan...
Question
A ceiling fan is rotating with an angular velocity of 10rad/s. It takes 40s to stop when it is switched off. The average angular velocity during this interval is (assume uniform angular retardation)
A
5rad/s
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B
4rad/s
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C
2rad/s
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D
−5rad/s
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Solution
The correct option is A5rad/s Given initial angular velocity ω0=10rad/s
Final angular velocity ω=0
Since angular retardation is constant.
Average angular velocity is given by ωavg=ω0+ω2 =10+02=5rad/s