00:01
In this problem, we're going to talk about the relativistic momentum.
00:03
And what we need to remember is that the relativistic momentum p can be written as the mass of a particle times its speed times gamma, where gamma is 1 over the square root of 1 minus v squared over c squared, where c is the speed of 1.
00:22
We need to remember that the newtonian momentum is just in v.
00:27
So the difference is the gamma factor in the relativistic momentum formula.
00:35
And our goal in this problem is to calculate what is the momentum of a protein that has a speed of 0 .999 times the speed of light.
00:47
The mass of this proton, we know that the mass of any proton actually, is 1 .67 times 10 to the minus 27 kilograms.
01:00
Okay, so in question a, our goal is to calculate p, so let's do it.
01:05
So p is just mv divided by the square root of 1 minus v squared over c squared.
01:13
M is 1 .67 times 10 to the minus 27 kilograms...