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    A main shaft is running 250rpm & machine spindle is to be driven directly from the main shaft to turn at 25rpm.If the diameter of pulley fitted on machine spindle is 20cm,What would be the diameter of pulley fitted on main shaft?
    NAVEEN MEENA Student Expert 9th Nov, 2019

    Dear student, here the angular acceleration of both the shafts will be same

    so, α1 = α2

    => ω1*r1 = ω2*r2

    where  r1  is the radius of pulley fitted on main spindle and  r2  is the radius of  pulley fitted on machine spindle.

    => 250*(d/2) = 25*(20/2)

    => d = 25*20/250 = 2 c.m.

    Therefor diameter of the pulley to be fitted on main spindle is 2c.m.

    All the best

    Hope this helps

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