Just like the first smash when you’re playing pool, quite a few balls are going down the table while a couple might go off up the table. There’s a net movement down the table. It gets more complicated because we’re talking balls of different masses and a bit of relativistic speeds, but analysis will reveal what those masses are and hence the net direction of the momentum and thus the direction of the velocity.
Just like the first smash when you’re playing pool, quite a few balls are going down the table while a couple might go off up the table. There’s a net movement down the table. It gets more complicated because we’re talking balls of different masses and a bit of relativistic speeds, but analysis will reveal what those masses are and hence the net direction of the momentum and thus the direction of the velocity.