Three point charges are positioned on the x axis. If the charges and corresponding positions are +32 ?C at x = 0, +20 ?C at x = 40 cm, and ?60 ?C at x = 60 cm, what is the magnitude of the electrostatic force on the +32-?C charge?
a. 84 N
b. 12 N
c. 36 N
d. 50 N
e. 48 N
b
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