Need a little help calculating something for my novel, for the sake of accuracy
If an object that weighs 1 kg is dropped into a hole that is 3 kilometers deep, how many seconds will it take to reach the bottom?
I tried solving it and got the answer 25 seconds, and I want to see how accurate I was, given I do poorly in maths, so here's another question for the same situation:
If an object that weighs 1 kg is dropped and hits the ground after 25 seconds, what is the depth of the hole/distance it fell?