Procedure: 1. Click the link: https://phet.colorado.edu/sims/html/coulombs-law/latest/coulombs-law_en.html 2. Choose the Macro Scale option. 3. Explore the simulation by changing the value of Charge 1 or Charge 2 and moving the position of the charged object on the ruler.

Questions 1. What happens to the force exerted as the charge (a) increases? (b) decreases? 2. What happens to the force as the distance between two charged objects

becomes (a) doubled? (b) tripled?

3. Does the sign of the charge affect the value of force?