Resolução - Halliday - Volume 3 - Eletricidade E Magnetismo - P22 050

Transcript

50. Regarding the forces on q3 exerted by q1 and q2 , one must “push” and the other must “pull” in order that the net force is zero; hence, q1 and q2 have opposite signs. For individual forces to cancel, their magnitudes must be equal: |q1 | |q3 | |q2 | |q3 | k 2 =k 2 (3d) (2d) which simplifies to Therefore, q1 = − 94 q2 . |q1 | |q2 | = . 9 4