Ac shaft patent

Solution: (1) mg = mgac = 0.5×10× 0.2 nm =1nm through torque balance.

(2) the sliding friction force f = μ g = 0.5× 0.5×10n = 2.5n.

M f =μmgCO = 2.5×0.2 nm = 0.5 nm.

M G +M f =M T of moment balance

Tension t = (mg+MF)/CB = (1+2.5× 0.2)/0.3n = 5n.