Two point charges totaling 8.00 mu C exert a repulsive force of 0.100 N on one a

Question

Two point charges totaling 8.00 mu C exert a repulsive force of 0.100 N on one another when separated by 0.925 m. What Is the charge on each? What is the charge on each If the force is attractive? Common transport tape becomes changed when pulled from a dispenser. If one place is placed above another, the repulsive force can be too piece's weight. Assuming equal point charges (only an approximation), calculate the magnitude of the charge if electrostatic force is great of a 14.0 mg piece of tape held 1.10 cm above another. (The magnitude of this charge is consistent with what Is typical of static electricity.)

Explanation / Answer

q1 - q2 = 8uC

q2 = 8uC +q1

F = k q1 q2 / r^2

0.1N = k q1 ( 8uC +q1) / (0.925^2)

0.1 (0.925^2) / K = 8uC q1 + q1^2

0.0095*10^-9 = 8uC q1 + q1^2

q1 = 1.187*10^-6 C

q1 = -2666.7 C

2) q1 + q2 = 9uC

q1 = 8uC - q2

0.1 (0.925^2) / K = 8uC q2 - q2^2

q2 = 2666.7 c

q2 = 1.187*10^-6 c

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