Unit3HelpFile - Unit 3 Help File Topics 1) How to use...

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Unit 3 Help File Topics 1) How to use graphical methods to determine an equilibrant. 2) How to use analytical methods to determine an equilibrant. i.e mathematically 3) Solving for two unknown vectors using simultaneous equations. 4) Addition notes for this unit. 1) How to use graphical methods to determine an equilibrant The method describe in the manual is the easiest way when using graphical methods to find a resultant or equilibrant. following is an example for three vectors. We have V 1 = 120@0 ° , V 2 = 350@165 ° and V 3 = 400@260 ° First start by selecting a scale to represent the magnitude of the vector, for example if 1cm= 100. Next select a point of origin and then draw the first vector to scale in its indicated direction from the origin.V 1 is shown below. V 1 would be drawn 1.2 cm and the horizontal has been chosen to be zero degrees. Next use a protractor to indicate determine the direction of the next vector V 2 (165 ° ) in relation to the tip of the first vector. Then draw the second line to scale 3.5 cm at it given direction from the tip of V 1 . V 1 V 2 V 1 165 ° Draw in the next vector using the given direction and scale factor V 3 = 4 cm from the tip of the second vector V 2 V 1 260 ° V 3 θ E V 2 165 ° Last connect the tip of V 3 to the start of V 1 . This is the resultant or equilibrant depended on the direction of the vector. The equilibrant is shown in the diagram. Measure the length of the equilibrant using the chosen scale to find its magnitude and use a protractor to measure the angle θ .
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2) How to use analytical methods to determine an equilibrant. i.e mathematically
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Unit3HelpFile - Unit 3 Help File Topics 1) How to use...

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