A particle (m = 50 g, q = 5.0 ?C) is released from rest when it is 50 cm from a second particle (Q = ?20 ?C). Determine the magnitude of the initial acceleration of the 50-g particle.
A. 54 m/s2
B. 90 m/s2
C. 72 m/s2
D. 65 m/s2
E. 36 m/s2
Answer: C
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