Easyphysics: Statics

Saturday 21 May 2011

Statics

Statics deals with the bodies at rest under the number of forces, the equilibrium and conditions of equilibrium etc.
If two forces $\underset{F_{1}}{\rightarrow}$ and $\underset{F_{2}}{\rightarrow}$ are acting on a body on a straight line but in opposite direction and the body remains at rest or in equilibrium, then we say that $\underset{F_{1}}{\rightarrow}$ and $\underset{F_{2}}{\rightarrow}$ are equal in magnitude and opposite in direction.

If the two forces $\underset{F_{1}}{\rightarrow}$ and $\underset{F_{2}}{\rightarrow}$ are acting on a body on a straight line but in opposite direction and body moves in the direction of $\underset{F_{2}}{\rightarrow}$ then we say that $\underset{F_{2}}{\rightarrow}$ is greater than $\underset{F_{1}}{\rightarrow}$ and the resultant force $\underset{F}{\rightarrow}$ or net force is calculated as:
                                                                        $\underset{F}{\rightarrow}$ = $\underset{F_{2}}{\rightarrow}$ - $\underset{F_{1}}{\rightarrow}$
   If $\underset{F_{1}}{\rightarrow}$ = 10N and $\underset{F_{2}}{\rightarrow}$ = 20N then,
                                                                       $\underset{F}{\rightarrow}$ = $\underset{F_{2}}{\rightarrow}$ - $\underset{F_{1}}{\rightarrow}$
                                                          $\underset{F}{\rightarrow}$ = 20 - 10 = 10N
Hence the body will move by the influence of 10N in the direction of $\underset{F_{2}}{\rightarrow}$ .

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Saturday 21 May 2011

Statics

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