Particle A (mass = m, charge = Q) and B (mass = m, charge = 5 Q) ...

[Alainaaa8]

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

[Shshxj]

Answer to Question 1

D

Answer to Question 2

B