Recent content by Not A Physicist

Sorry. It seems to me that if all particles had their velocity reversed, gravity (and the other forces) would just bring many of them to a halt and turn them around again, with the result that nothing much changed.

I understand that, but if time started running backwards wouldn't gravity slow it down and pull it back around to its usual direction?

I was wondering why the arrow of time can't be defined by the direction in which the forces hold their observed values. It seems to me that if the arrow were to be reversed this would necessitate a reversal of the forces' ability to attract or repel. For example: wouldn't gravity have to start...

Hello! I am a lover of physics and a would be engineer. I am on a lifelong quest to expand my knowledge of the sciences.