1. The problem statement, all variables and given/known data What is the speed of impact of electrons with the screen of the picture tube? Answer in units of m/s. Electrons are accelerated through a potential difference of 15500 V Charge of electron: 1.6 x 10^-19 C Mass of electron: 9.11 x 10^-31 kg Energy of electrons when they hit the screen: 2.48E-15 J 2. Relevant equations v=Ed f=ma f=qE K = .5mv^2 3. The attempt at a solution I tried using that equation, I made it 15500 = .5mv^2 ... obviously plugging in the above numbers for m and v. Computer said the answer was wrong.