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College Physics

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A string that passes over a pulley has a 0.331g mass attached to one end and a 0.625g mass attached to the other end. The pulley, which is a disk of radius 9.50cm , has friction in its axle.
What is the magnitude of the frictional torque that must be exerted by the axle if the system is to be in static equilibrium?

  • College Physics -

    Difference in mass, Δm
    = 0.625-0.331 g
    = 0.294/1000 kg
    = 0.000294 kg

    Radius, r
    = 9.5 cm
    = 0.095 m

    Torque required
    =Δm * r Nm

  • College Physics -

    F=mv^2/r v=u^2+2as

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