cheska_P
  • cheska_P
Hi, do you know how to solve this : Three forces act on a point: 4N at 0 degrees, 5N at 90 degrees, and 8N at 45 degrees. What is the net force acting on that point?
Physics
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SOLVED
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katieb
  • katieb
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zephyr141
  • zephyr141
first thing you should always do is draw a Full Body Diagram of this system of forces.|dw:1444025549427:dw|
zephyr141
  • zephyr141
now add up all the forces in the y direction and all the forces in the x direction.
zephyr141
  • zephyr141
\[x:4+8\cos 45\]\[y:5+8\sin 45\] then use Pythagorean's Theorem to find the net force. \[f_{net}=\sqrt{x^2+y^2}\]

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BAdhi
  • BAdhi
and the angle \(\theta = \tan^{-1} \left(\frac y x \right)\)

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