I am sorry if I am wrong but, the net force would be zero. 0
Yes yes yes yes yes yes yes yes
The car traverses a distance
after time
according to

where
is its acceleration, 10 m/s^2. The time it takes for the car to travel 25 m is

5 is pretty close to 4, so we can approximate the square root of 5 by 2. Then the car's velocity
after 2 s of travel is given by

which makes C the most likely answer.
Answer:
They move outwards.
They don't intersect each other at any point.
They show the electric field.
Explanation: