a rotating fan with radius completes a 1200 rpm with radius of 0.4 m. what is the angular velocity in rad./ sec and its linear velocity in m/s.
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if fan rotates 1200 times in one minute
⇒ the fan rotates 20 times in 1 second
⇒ the fan rotates 20×2π radians in 1 second
⇒ the fan rotates 125.66 radians per second
we know linear velocity = r × ω
⇒ linear velocity = 0.4 × 125.66 = 50.26 m/sec
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