Resolução - Halliday - Volume 3 - Eletricidade E Magnetismo - P22 045

Transcript

45. The magnitude of the net force on the q = 42 × 10−6 C charge is k q1 q |q2 | q +k 0.282 0.442 where q1 = 30 × 10−9 C and |q2 | = 40 × 10−9 C. This yields 0.22 N. Using Newton’s second law, we obtain F 0.22 N = 2.2 × 10−6 kg . m= = a 100 × 103 m/s2