1. The problem statement, all variables and given/known data A particle of charge Q is fixed at the origin of an xy coordinate system. At t = 0 a particle (m = 0.671 g, q = 5.90 µC is located on the x axis at x = 15.6 cm, moving with a speed of 54.4 m/s in the positive y direction. For what value of Q (in μC) will the moving particle execute circular motion? (Neglect the gravitational force on the particle.) 2. Relevant equations F=F F=kqQ/r^2 F=mv^2/r 3. The attempt at a solution F=F kqQ/r^2=m(v^2)/r kqQ=m(v^2)r (8.99*10^9)(5.9*10^-6 C)(Q) = (.000671 kg)((54.4 m/s)^2)(.156 m) 53100 * Q = .30977 Q= .0000058337 C Q= 5.8 μC I have not been able to find my error, but I did something wrong, as the wileyplus marks it incorrect.