Question

A stone falls freely from rest. How fast is it falling after 10 seconds?

Answer 1

the stone starts frm rest so its initial velocity will be 0
as a =vf-vi/t
a=vf/t
as its falling so its speed will be constent at 9.8 m/ssquare
a =9.8/10
a = .98m

Answer 2

use \[v = u + at, \ but \ u = 0, \ v = at, \ a = g = 9/8 \frac{m}{s^2}\]
t = 10