Question: A proton has an initial speed of 3.9 x 105 m/s.
(a) What potential difference is required to bring the proton to rest? _________________ kV
(b) What potential difference is required to reduce the initial speed of the proton by a factor of 3? _________________ kV
(c) What potential difference is required to reduce the initial kinetic energy of the proton by a factor of 3? _______________________kV