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Revision as of 15:38, 14 September 2010 (edit) Ian (Talk | contribs) (New page: The diagram shows the forces acting on the ladder. Image:14.7.gif Taking moments about the base of the ladder: <math>\begin{align} & 5\sin \theta \times S=2\textrm{.}5\cos \theta \t...) ← Previous diff

Current revision (15:38, 14 September 2010) (edit) (undo) Ian (Talk | contribs) (New page: The diagram shows the forces acting on the ladder. Image:14.7.gif Taking moments about the base of the ladder: <math>\begin{align} & 5\sin \theta \times S=2\textrm{.}5\cos \theta \t...)

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Current revision

The diagram shows the forces acting on the ladder.

Taking moments about the base of the ladder:

\displaystyle \begin{align} & 5\sin \theta \times S=2\textrm{.}5\cos \theta \times 196 \\ & S=\frac{2\textrm{.}5\cos \theta \times 196}{5\sin \theta }=\frac{98}{\tan \theta }\text{ N} \\ \end{align}