From Mechanics

Revision as of 10:25, 20 May 2010 (edit) Ian (Talk | contribs) ← Previous diff		Current revision (10:35, 20 May 2010) (edit) (undo) Ian (Talk | contribs)
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	<math>\begin{align}		<math>\begin{align}
	& \downarrow :\ \text{Resultant}\ \text{Force}=300\times 9 \textrm{.}81-T=		& \downarrow :\ \text{Resultant}\ \text{Force}=300\times 9 \textrm{.}81-T=
-	ma = 300\times 0 \textrm{.}1 \\	+	ma = 300\times 0 \textrm{.}2 \\
	& \\		& \\
-	& T=2943-30\approx 2910\ \text{N} \\	+	& T=2943-60\approx 2880\ \text{N} \\
	\end{align}</math>		\end{align}</math>

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Current revision

Here \displaystyle T is the tension in the cable and \displaystyle a is the acceleration of the packet.

Applying Newton's second law

\displaystyle \begin{align} & \downarrow :\ \text{Resultant}\ \text{Force}=300\times 9 \textrm{.}81-T= ma = 300\times 0 \textrm{.}2 \\ & \\ & T=2943-60\approx 2880\ \text{N} \\ \end{align}