From Mechanics

Revision as of 10:35, 23 March 2010 (edit) Ian (Talk | contribs) ← Previous diff		Current revision (10:42, 23 March 2010) (edit) (undo) Ian (Talk | contribs)
Line 9:		Line 9:
	Here		Here
-	<math>V=A</math> and	+	<math>V=3\ \text{N}</math> and
-	<math>H=B</math>.	+	<math>H=4\ \text{N}</math>.
	Substituting the given values		Substituting the given values
-
	<math>\begin{align}		<math>\begin{align}
-	& {{F}^{2}}={{4}^{2}}+{{3}^{2}}=25 \\	+	{{F}^{2}}={{4}^{2}}+{{3}^{2}}=25 \\
-	& \text{giving} \\	+
-	& F=5\ \text{N} \\	+
	\end{align}</math>		\end{align}</math>
		+	giving
		+
		+	<math>\begin{align}
		+	F=5\ \text{N} \\
		+	\end{align}</math>
	Also		Also

---

Current revision

Using \displaystyle {{F}^{2}}={{H}^{2}}+{{V}^{2}}

and

\displaystyle \tan \alpha =\frac{V}{H}

Here

\displaystyle V=3\ \text{N} and \displaystyle H=4\ \text{N}.

Substituting the given values

\displaystyle \begin{align} {{F}^{2}}={{4}^{2}}+{{3}^{2}}=25 \\ \end{align}

giving

\displaystyle \begin{align} F=5\ \text{N} \\ \end{align}

Also

\displaystyle \tan \alpha =\frac{3}{4}=0\textrm{.}75

giving

\displaystyle \alpha =36\textrm{.}9{}^\circ