The electron are accelrated to a speed of 2.40*10^7 in 1.8*10^-9, the force experinced by an electron?

Force = mass * acceleration

To find acceleration, we can divide the speed by the time it took:

acceleration = 2.40*10^7 / 1.8*10^-9

acceleration = 1.33*10^16

the mass is equal to the mass of an electron

force = (9.11*10^-31) (1.33*10^16)

force = 1.21*10^-14 N