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 = 12 mC, what is the kinetic energy of particle B at the instant when the particles are 3.0 m apart?
a. 8.6 J
b. 3.8 J
c. 6.0 J
d. 2.2 J
e. 4.3 J
Question 2
A particle (charge = Q) is kept in a fixed position at point P, and a second particle (charge = q) is released from rest when it is a distance R from P. If Q = +2.0 mC, q = -1.5 mC, and R = 30 cm, what is the kinetic energy of the moving particle after it has moved a distance of 10 cm?
a. 60 kJ
b. 45 kJ
c. 75 kJ
d. 90 kJ
e. 230 kJ
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