I'd like to check i'm understanding what I'm reading. Hopefully someone on this forum will confirm or disconfirm the following:
I have just read that objects accelerate when they fall. No explanation was given as to why they accelerate and not stay the same speed. However the book has previously mentioned Newton's first law so I am thinking the reason is as follows:
According to 1st law, moving objects travel at constant speed if the net forces are 0, and accelerate/decelerate if forces are not equal.
When things fall they have a downward force which is their weight due to gravity(?) and an upward force (friction from air resistance?). If they are accelerating then these forces aren't equal so the weight due to gravity exceeds air resistance?
I presume then that terminal velocity is when air resistance matches downward force and you don't travel any faster.
Please let that be right :) (at a simple level)