00:01
For part a, the proton, you have initial energy and you have final energy.
00:08
So the kinetic plus the potential plus the change in the energy reached, the initial equals the kinetic final plus the potential final.
00:27
So if we break this down, piece by piece, initial kinetic is zero, because not moving plus initial potential is qv plus the change is zero energy reach that equals one half mv squared for the final kinetic energy of the proton plus zero for the potential so we get qv equals one half mv squared so we plug in the values qv, 1 .6 times 10 to the negative 19th coolums for the charge times 120 volts for the potential difference, the voltage equals 1 .5 times the mass, 1 .67 times 10 to negative 27 kilograms multiplied by v squared.
01:46
So if you rearrange, it's all for v, you get a final answer of 1 .52 times 10 to the fifth meters per second.
02:06
That is the final velocity of the proton, 1 .52 times 10 to 5 meters per second.
02:21
That is velocity...