A particle (charge 7.5 mC) is released from rest at a point on ...

[elizabeth18]

A particle (charge 7.5 mC) is released from rest at a point on the x axis, x = 10 cm. It begins to move due to the presence of a 2.0-mC charge which remains fixed at the origin. What is the kinetic energy of the particle at the instant it passes the point x = 1.0 m?
 a. 3.0 J
  b. 1.8 J
  c. 2.4 J
  d. 1.2 J
  e. 1.4 J

Question 2

A particle (charge = 40 mC) moves directly toward a second particle (charge = 80 mC) 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

[uniquea123]

Answer to Question 1

D

Answer to Question 2

C

[elizabeth18]

Excellent

[frankwu0507]

Gracias!