- #1

Numeriprimi

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## Homework Statement

We have got a ball of radius r, which is falling from the roof of the house. How is the radius r with respect to time? We are looking at the ball directly from above and ball is at the beginning of fall x from our eyes. Neglect air resistance.

## Homework Equations

I'm not sure what to write here. So I think the nub is equation of free fall: s= 1/2gt^2 radius decreases quadratically

## The Attempt at a Solution

So, I know equation: s= 1/2gt^2

I think the radius decreases quadratically, because t^2.

I must attributed the x (s from eyes before free fall)

And my equation: r(t)= r/(1/2gt^2 + x)

It is right? Thanks for help.

PS: Sorry for bad English, but I don't know better yet.