Can anyone please help me with this? : An electron of mass 9.11 x 10^-31 kg is accelerated by a constant force along the direction of its motion from 2 x 106 m/s to 8 x 106 m/s within 2.00 cm. What is the magnitude of the force?

Answer 1

vf^2=vi^2+2ad where acceleration a is = force/mass

(8e6)^2=(2e6)^2+force*.02/9.11e-31
solve for force