Question

Calculate the speed of a proton that is accelerated from rest through a potential difference
of 198 V.
Answer in units of m/s

Answer 1

energy = (1/2) m v^2 = 198 electron-Volts = 198 eV

1 eV = 1.6x10^-19 J

proton mass = m = 1.67 x10^27 kg

from these you can calculate V^2 and thus v, m/s

Answer 2

That should be \(m = 1.672622*10^{\color{red}{-}27} \text { kg}\)

Answer 3

Thank you. Especially important is that - sign, in 10^-27 kg. Sorry.

Answer 4

Thank you :)