A particle (charge = 40 C) moves directly toward a second ...

[littleanan]

A particle (charge = 40 C) moves directly toward a second particle (charge = 80 C) which is held in a fixed position. At an instant when the distance between the two particles is 2.0 m, the kinetic energy of the moving particle is 16 J. Determine the distance separating the two particles when the moving particle is momentarily stopped.
 a. 0.75 m
  b. 0.84 m
  c. 0.95 m
  d. 0.68 m
  e. 0.56 m

Question 2

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 C, 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

[kescobar@64]

Answer to Question 1

c

Answer to Question 2

d

[littleanan]

Thanks for the timely response, appreciate it

[amcvicar]

Gracias!