00:01
Hello everyone, again, a wonderful problem about this speciality and relative velocity.
00:12
And in this problem here, two spacecrafts are moving toward earth.
00:19
This is spacecraft.
00:20
Let us call this a, for example.
00:23
And this one is b.
00:25
In fact, they are moving in the same direction, so it's better to make this parallel to the first one here to be.
00:34
So we are moving in the same direction toward earth and we are given the velocity for each one of them for a for we are given that the a with respect to earth.
00:50
Let us actually call this v a with respect to earth is equal to 0 .8c okay and v b with respect to earth is equal to 0 .5c it won't matter if you call 0 .5c the velocity or o point of a velocity of b that's fine actually these are just symbols that we will use to simplify the analysis now the relative velocity and this is what's required and this problem is to get the relative velocity between a and b.
01:34
This is equal to what? this is equal to va with respect to the errors.
01:43
As i told you before, i used the classical formula and this is how i remember the relativistic formula...