PhET Simulation: Forces and Motion

A . Coulomb Force . 1. Two Coulomb forces are exerted on a charged object and they are in different directions. How do you calculate the net force on the object? 2. I expect the net force in the previous question to be in the 2nd quadrant. But my calculator shows it is in the 4th quadrant. What should I do? B. Electric Field. 1. ................
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