Coulomb's Law Practice

Two charged spheres are on a frictionless horizontal surface as shown. One has a charge of -3.0 x 10^-6 C and the other sphere has a +6.0 x 10^-6 C charge. The distance between them is 5 cm.

1. Is this an attractive or repulsive force? (circle one) attractive repulsive

How do you know?

1. What would be different if both spheres were neutral?

1. What would be different if both were negatively charged?

1. What would be different if only one was charged?

1. What is the electrostatic force acting on each ion?

Given(s)	Unknown(s)	Equation(s)	Substitution(s)	Solution(s)

1. By what factor would the force change if the distance between them is brought three times closer?

1. By what factor would the force change if the distance between them is 5 times bigger? ____________________

1. How many electrons would have to jump from a neutral object to give a second neutral object a charge of - 2.208 x 10^-17 C?

Given(s)	Unknown(s)	Equation(s)	Substitution(s)	Solution(s)

1. What would be the charge on the first neutral object?