7.2 Exercise 22

An electron is to be accelerated in a uniform electric field having a strength of $2.00 \times 10^{6} \text{V}/\text{m} .$ (a) What energy in keV is given to the electron if it is accelerated through 0.400 m? (b) Over what distance would it have to be accelerated to increase its energy by 50.0 GeV?