CAIE M1 2012 June — Question 2

Exam BoardCAIE
ModuleM1 (Mechanics 1)
Year2012
SessionJune
TopicNewton's laws and connected particles

2
\includegraphics[max width=\textwidth, alt={}, center]{918b65cc-617d-4942-8d96-b02eef21e417-2_471_621_870_762} A smooth ring \(R\) of mass 0.16 kg is threaded on a light inextensible string. The ends of the string are attached to fixed points \(A\) and \(B\). A horizontal force of magnitude 11.2 N acts on \(R\), in the same vertical plane as \(A\) and \(B\). The ring is in equilibrium. The string is taut with angle \(A R B = 90 ^ { \circ }\), and the part \(A R\) of the string makes an angle of \(\theta ^ { \circ }\) with the horizontal (see diagram). The tension in the string is \(T \mathrm {~N}\).
  1. Find two simultaneous equations involving \(T \sin \theta\) and \(T \cos \theta\).
  2. Hence find \(T\) and \(\theta\).