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secondary 3 | A Maths
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Date Posted: 4 years ago
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Hi Tarah! Here is one way to do this question by a parallelogram idea.
We use a suitable scale that gives us a good size of the parallelogram on the drawing space. I have used a scale of 1 cm to 50 N in this diagram, so that 210 N is represented by 4.2 cm on the drawing space and 360 N is represented by 7.2 cm on the drawing space.
Another scale to consider is 1 cm to 20N, wich leads to 210 N being represented by 10.5 cm on the drawing space and 360 N being represented by 18 cm on the drawing space. This is bigger and more accurate, but may not be appealing to everyone due to the amount of space taken on the paper.
The angle 120 degrees remain the same in all cases.
Of course, the lengths which I have drawn out are accurate on the paper which I have used, but may not be displayed to scale on this screen due to different scalings on this screen.
On my paper, I found that the resultant force, marked by the red line, has a diagram length of 6.3 cm. Using the scale which I have used, the resultant force is 315 N.
We use a suitable scale that gives us a good size of the parallelogram on the drawing space. I have used a scale of 1 cm to 50 N in this diagram, so that 210 N is represented by 4.2 cm on the drawing space and 360 N is represented by 7.2 cm on the drawing space.
Another scale to consider is 1 cm to 20N, wich leads to 210 N being represented by 10.5 cm on the drawing space and 360 N being represented by 18 cm on the drawing space. This is bigger and more accurate, but may not be appealing to everyone due to the amount of space taken on the paper.
The angle 120 degrees remain the same in all cases.
Of course, the lengths which I have drawn out are accurate on the paper which I have used, but may not be displayed to scale on this screen due to different scalings on this screen.
On my paper, I found that the resultant force, marked by the red line, has a diagram length of 6.3 cm. Using the scale which I have used, the resultant force is 315 N.
Date Posted:
4 years ago
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