Question

In addition to ball 1 with a charge of +14 ?C located at the origin at rest, ball 2 has a charge of
-28 ?C and is placed at x=1, y=2. Assume the only forces on these balls are these electrostatic
forces.
a. What is the force of ball 1 on ball 2? What is the force of ball 2 on ball 1? Remember that
force is a vector, so to specify force means both magnitude and direction. How do the
magnitudes of these forces compare?
b. If these balls were allowed to move, what is the acceleration of each at this instant while
they are both at the given locations when you let them go? Compare the accelerations to
each other.
c. What is the electric field at the origin (due to ball 2)? How does the magnitude of this
electric field compare to the the magnitude of the electric field at x=1, y=2 (due to ball 1)?
Explain using the electric field how Newton’s 3rd Law is obeyed for these two charges.
d. If ball1 was at the origin but moving at 5m/s in the positive x-direction, in which direction
would its velocity vector point a few instants later? (name just the quadrant I, II, III, or IV)

Answer 1