Question

An electron of mass 9.11 x 10⁻³¹ kg has an initial speed of 3.00 x 10⁵ m/s. It travels in a straight line, and its speed increases to 9.00 x 10⁵ m/s in a distance of 4.00 cm. 1) What is the ratio of this force to the weight of the electron, which we neglected?

Answer 1

Answer: a. The magnitude of the force exerted on the electron F = 3.64*10^-18N

b. The force F is 4.08*10^11 times the weight of the electron