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Q7) A 14 kg wheel and shaft runs in horizontal bearings. The shaft is 50 mm in diameter and has a cord wound around it with a hook at its free end. A 0.3 kg mass hanging from the hook is just sufficient to overcome friction, whilst a 2 kg mass fall 1.05 m in 8 seconds from rest.

Calculate EACH of the following:

(a) Radius of gyration for the wheel and shaft; (12)

(b) Torque transmitted to the wheel and shaft by the 2 kg mass. (4)