Inside a particular cathode ray tube, there is a uniform
electric field with a magnitude 389 N/C pointing in
the positive x-direction. An electron, initially at
rest, moves a distance of 2.70 cm in this field.
(a)
How much work (in J) does the electric field do on the
electron?
J
(b)
What is the change in potential energy (in J) of the entire
system (cathode ray tube plus electron)?
J
(c)
What is the velocity (in m/s) of the electron after it moves
the 2.70 cm distance?
magnitude ____m/s
direction ? (+x, -x, +y, -y)