An electron is projected, with an initial speed of 3.2×10^5 m/s , directly towards a proton that is essentially at rest. If the electron is initially at a great distance from the proton, at what distance from the proton is its speed instantaneously equal
An electron is projected, with an initial speed of 3.2×10^5 m/s , directly towards a proton that is essentially at rest. If the electron is initially at a great distance from the proton, at what distance from the proton is its speed instantaneously equal to twice its initial value? Express your answer in meters.