A wheel of inner radius r 1 = 13.0 cm and outer radius r 2 = 35.0 cm shown in th

Question

A wheel of inner radius r1 = 13.0 cm and outer radius r2 = 35.0 cm shown in the figure below is free to rotate about the axle through the origin O. What is the magnitude of the net torque on the wheel due to the three forces shown? (Assume F1 = 3.60 N, F2 = 6.40 N, F3 = 13.4 N.)

A wheel of inner radius r1 = 13.0 cm and outer radius r2 = 35.0 cm shown in the figure below is free to rotate about the axle through the origin O. What is the magnitude of the net torque on the wheel due to the three forces shown? (Assume F1 = 3.60 N, F2 = 6.40 N, F3 = 13.4 N.)

Explanation / Answer

net torque is

F1r2 + F3 cos 45 r1 - F2 r2

= 3.6 x 0.35 +13.4 cos 45 x 0.13 - 6.4 x 0.35 = 0.3Nm

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