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a) The figure shows an arrangement of two -1.9 nC charges, each separated by 5.0 mm...

a) The figure shows an arrangement of two -1.9 nC charges, each separated by 5.0 mm from a proton. If the two negative charges are held fixed at their locations and the proton is given an initial velocity v as shown in the figure, what is the minimum initial speed v ( in km/s) that the proton needs to totally escape from the negative charges? (k = 1/4πε0 = 8.99 × 109 N.m2/C2, e = 1.60 × 10-19 C, mproton = 1.67 x 10-27 kg)

b) Particle A (mass = m, charge = Q) and B (mass = m, charge = 5 Q) are released from rest with the distance between them equal to 1.0 m. If Q = 17.5 μC, what is the kinetic energy (in J) of particle B at the instant when the particles are 3.0 m apart?

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