For my physics class we did a lab to show that if an object is at rest then its

Question

For my physics class we did a lab to show that if an object is at rest then its total force and torque must be zero.

Here's a diagram of the setup:

Weight of the meter stick: 142 g.

Weight of the mass: 250 g.

Tension in the string on the left: 2.6 N.

Tension in the string in the right: 1.35 N.

Total distance between the two spring scales: 94 cm

Center of gravity (cog) in the meter stick: 47 cm from each spring scale

Position of the weight: 72 cm from the left spring scale, 22 cm from the right spring scaleÂ

Uncertainty in the protractor: 3%

Uncertainty in the spring scale: 2%

Uncertainty in the meter stick: 1%Â

So, these are my calculations and results:

I don't know if I'm right, but I think so. The problem is that I have to show that my results fall within the margin of error (I have to use the uncertainties shown above) and I don't know how to do that. Can you help me?

Explanation / Answer

Froce in x direction ::;

Fs2*cos(82) -Fm*cos(73) + Fs1*cos(68) -Fcog*cos(73) =

force in y direction :::

Fs1*sin(68) + Fs2*sin(82) -Fm*sin(73) -Fcog*sin(73) =

rest are correct

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