| Exam Board | CAIE |
| Module | M1 (Mechanics 1) |
| Year | 2015 |
| Session | November |
| Marks | 5 |
| Topic | Friction |
2
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A ring of mass 0.2 kg is threaded on a fixed rough horizontal rod and a light inextensible string is attached to the ring at an angle \(\alpha\) above the horizontal, where \(\cos \alpha = 0.96\). The ring is in limiting equilibrium with the tension in the string \(T \mathrm {~N}\) (see diagram). Given that the coefficient of friction between the ring and the rod is 0.25 , find the value of \(T\).
[0pt]
[5]