1.
\begin{figure}[h]
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\caption{Fig. 1}
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Figure 1 shows a particle \(P\) of mass 4 kg on a smooth plane inclined at \(15 ^ { \circ }\) to the horizontal. \(P\) is held in equilibrium by a horizontal force, \(F\).
- Show that the normal reaction exerted by the plane on \(P\) is 40.6 N correct to 3 significant figures.
- Calculate the value of \(F\).