Philosophy Now Forum

2. The steeper the slope, the faster things travel down it. My problem: OK, this should be obvious, I realise, but I cannot figure out why this is the case. It is good to be skeptical of any "it's obvious" answers. Sometimes there is a good reason for it to be obvious, and sometimes not. ...

My problem: How on earth can anything move if any attempt to do so is met with an equal and opposite reaction? You have to understand what, precisely, "reaction" means in the context of the Third Law. To a first approximation, you can think of "action" and "reaction" a...