Physics problem, please help?

Question

An electron of mass 9.11×10−31 kg leaves one end of a TV picture tube with zero initial speed and travels in a straight line to the accelerating grid, which is a distance 1.55 cm away. It reaches the grid with a speed of 3.90×106 m/s. The accelerating force is constant. Find the acceleration, the time to reach the grid, find the net force. (You can ignore the gravitational force on the electron).

Answer 1

Use the equation v^2 = vo^2 + 2ax to find the acceleration. Then use v = vo + at to find the time. Then use F = ma to find the force.