Physics Question. Please help!?

0 ⤊

Physics Question. Please help!?

If 2 metal balls each have a charge of -10^-6 C and the repulsive force between them is 1 N, how far apart are they?

2007-12-02 03:56:06 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Physics

2 answers

Coulomb's law force F is
F=kQ1Q2/R^2 where
k - electrostatic constant =8.988 E+9 N m^2/C^2
Q1,Q2 charges
R - distance between the charges
since Q1=Q2
we have
R=sqrt( kQ^2/F)=
R=Qsqrt( k/F)
R= 1 E-6 sqrt( 8.988 E+9 /1)=0.095 m or 9.5 cm

2007-12-02 04:05:11 · answer #1 · answered by Edward 7 · 0⤊ 0⤋

as above, use inverse square law.

2007-12-02 04:50:50 · answer #2 · answered by brownian_dogma 4 · 0⤊ 0⤋