Calculate the Force between Charges

[wizard.ubit]

Homework Statement

Find the magnitude of the force b/w charges

(1,2,3) (5,-2,4)

() ()
5 micro Columb 6 micro columb
charge 1 charge 2

The Attempt at a Solution

Vector r = (5-1)i + (-2-2)j + (4-3)k
Vector r = 4i -4j + k

Magnitude of Vector r = Square root (4^2 + (-4)^2 + 1^2)

Magnitude of Vector r = square root (33) or 5.744


a/c to columbs law

F= (9x10^9) (5x10^-6 ) (6x10^ -6 ) (4i-4j+k)
5.744 ^3 (cube b/c unit vector )

F= 0.27 { what should i do of ( 4i-4j+k )
5.744^3


what should i do please i hve got paper on WeDnesday Help me

 

[rl.bhat]

Hi wizard.ubit, welcome to PF.
In the problem only magnitude is required.
So F = k*q1*q2/d^2