Edexcel M1 2016 January — Question 5

Exam BoardEdexcel
ModuleM1 (Mechanics 1)
Year2016
SessionJanuary
TopicMoments

5. \begin{figure}[h]
\includegraphics[alt={},max width=\textwidth]{054e11cb-9416-40c0-9dde-8d12818bab3f-07_531_1182_114_383} \captionsetup{labelformat=empty} \caption{Figure 2}
\end{figure} A non-uniform rod \(A B\) has length 4 m and weight 120 N . The centre of mass of the rod is at the point \(G\) where \(A G = 2.2 \mathrm {~m}\). The rod is suspended in a horizontal position by two vertical light inextensible strings, one at each end, as shown in Figure 2. A particle of weight 40 N is placed on the rod at the point \(P\), where \(A P = x\) metres. The rod remains horizontal and in equilibrium.
  1. Find, in terms of \(x\),
    1. the tension in the string at \(A\),
    2. the tension in the string at \(B\). Either string will break if the tension in it exceeds 84 N .
  2. Find the range of possible values of \(x\).