To start her lawn mower julie pulls on a cord that is, Ask an Expert

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To start her lawn mower, Julie pulls on a cord that is wrapped around a pulley. The pulley has a moment of inertia about its central axis of I=0.570 kg(m2) and a radius of 4 cm. There is an equivalent frictional torque impeding her pull of Tf=.450 m(N). How much tension must the rope exert?

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