From Mechanics

Revision as of 15:38, 3 February 2011 (edit) Ian (Talk | contribs) ← Previous diff		Current revision (17:03, 26 March 2011) (edit) (undo) Ian (Talk | contribs)
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-	<math>F=W=840\ \text{N}</math>	+	<math>F=W=7840\ \text{N}</math>

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Current revision

The lift force \displaystyle F must balance the weight \displaystyle W, that is

\displaystyle F-W=0

But \displaystyle W=mg=800\times 9\textrm{.}8=7840\ \text{N}

Which gives \displaystyle F=W=7840\ \text{N}