Recent content by aorrdalca

I've seen a number of posts on the following question, but don't believe any contain a solution to the following very simple scenario: A sphere of radius r and mass m rolls down a plane inclined at theta degrees. What are its linear and angular velocities at any time t thereafter, assuming it...

Thank you everyone for the very helpful responses.

I shouldn't have used the word "back", because the particle's previous trajectory is not really relevant here. The point I was trying to make was that by starting beyond the event horizon a particle would be expected - under classical mechanics - to reach a terminal velocity greater than c when...

Probably there's a simple answer for the following question. What prevents a neutral particle falling into a black hole from beyond the event horizon - a point it would have to have an escape velocity greater than the speed of light to reach from the inside - from being accelerated past the...