Finding Force of an electron in motion

[mrye33]

Please help, I keep getting the wrong answer but do not know why. Thanks An electron of mass 9.11x10^(-31) kg has an initial speed of 3.24x10^5 m/s. It travels in a straight line, and its speed increases to 6.93x10^5 m/s in a distance of 5.15 cm. Assume its acceleration is constant.

a. determine the force exerted on the electron.

b. compare this force with the weight of the electron, which we neglected.

 

[ap123]

Hi mrye33!

Could you show us what you've already done.