posted by ali on .
Three spheres, each with a negative chrge of 4.0x10^6C, are fixed at the vertices of an equilateral triangle whose sides are 0.20 m long. Calculate the magnitude and direction of the net electric force on each spehere.
i used this: (K)Cos30((4.0*10-6)*2)/(0.2*2)
and i get 3.1 every time...
I have answered this one twice as well
^ means exponent
times 2 for two spheres forcing third
thank you for responding:
using this i got 3.1. so then i need to double it because it's two spheres. right?
and sorry about the formula in the question. i confused my self with the "times" and "exponent".
cos 30 = 1/2
so 9*16 /4 and figure out decimal= 36 *10^(9-12+2)
oh sorry, cos 30 = .866
thank you. this was very helpful.
You are welcome.
Im working on this same question too and i cant figure out how you got the .5 when doing 3.6*.866/.5 ??? because i know the answer is correct, is it because the net force goes through the middle?