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Propeller blades, 2 m long , ar e rotati...

Propeller blades, 2 m long , ar e rotating at 1800 rpm. What is the linear speed of the tip of the blades ?

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The correct Answer is:
377.0 m/s
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Knowledge Check

  • An electric fan has blades of length 30 cm as measured from the axis of rotation .If the fan is rotating at 1200 r.p.m., then the acceleration of a point on the tip of the blade is ("take" pi^(2)=10)

    A
    `1600m//s^(2)`
    B
    `3200m//s^(2)`
    C
    `4800 m//s^(2)`
    D
    `600m//s^(2)`

  • An electric fan has blades of length 30 cm neasured from the axis of rotation. If the fanrotating at 120 rev/min. the acceleration of a point on the tip if the blade is

    A
    `1600ms^(-2)`
    B
    `47.4ms^(-2)`
    C
    `23.7ms^(-2)`
    D
    `50.55ms^(-2)`

  • The second's hand of a watch is 2 cm long. The speed of the tip of this hand is

    A
    0.21 cm/s
    B
    2.1 cm/s
    C
    21.0 cm/s
    D
    none of these

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