Hello,

I have been looking at the calculators on this site, but cannot seem to find precisely what I need. I don't need a very precise answer, merely a realistic ballpark one.

I need to know how we find the rough speed of an object's movement when a certain amount of force is applied to it.

For example, if I apply 5 lbs of force to a rock weighing 1 lb, how fast would it move (in mph, or if kph is much easier, that answer instead).

Similarly, what happens if a disk on the ground weighs 10 lbs, and I apply 5 lbs of pressure pushing/pulling it on the ground. How in these instances would I discover the speed of movement? I'm sure the surface friction is relevant to some degree, but how?

Again, I don't need these answers to be exacting, just a general formula for educated guesses.

Thanks in advance,

Daniel