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Magnitude and direction

  • #1
I attached problem.

I got F1 = 2.7x10-8
and F2 = 8.3x10-9

sqrt(f1^2 +f2^2) = 2.818x10^-8

theta was inverse tan of f1/f2. got 72.8

please help :(
 

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  • #2
SteamKing
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I attached problem.

I got F1 = 2.7x10-8
and F2 = 8.3x10-9
I don't get these forces. Perhaps you should attach you calculations.
sqrt(f1^2 +f2^2) = 2.818x10^-8

theta was inverse tan of f1/f2. got 72.8

please help :(
Re-check your calculations for F1 and F2.
 
  • #3
I think I know what I did...dumb mistake.

Did you get:
f1=2.04E-7
f2=1.762E-7

NEW magnitude= 2.69E-7
NEW theta=49
 
  • #4
and I was using F=G(7.30)(7.30)/(0.132)^2 for F1 and F2 just subbed in 0.427.

Thanks for your help.
 
  • #5
SteamKing
Staff Emeritus
Science Advisor
Homework Helper
12,796
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I think I know what I did...dumb mistake.

Did you get:
f1=2.04E-7
f2=1.762E-7

NEW magnitude= 2.69E-7
NEW theta=49
F2 is still incorrect.
 
  • #6
Yeah I don't know what I did there. I got it now though. magnitude:2.05E-7 and direction of 85 degrees.

Thank you!
 

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