an electron travels at a horizontal velocity of 5×10^6m/s in vacuum between two charged plates 100mm long and 20mm apart, towhich potential difference of 30v is applied. the chargeon an electron is 1.5×10^-19c and the mass of an electron is 9.1×10^_31kg. what size force will the electron experience while it passes through the plates?​

the motion of a pendulum is a classic example of mechanical energy conservation. a pendulum consists of a mass (known as a bob ) attached by a string to a pivot point. as the pendulum moves it sweeps out a circular arc, moving back and forth in a periodic fashion.

force required to detach it is given by

charges are taken to be fundamental charge

now we have

so above is the minimum distance at which it will detach