Question

An object falls freely from rest near the surface of Earth, What is the speed of
the object after having fallen a distance at 4,90 meters...how do i solve this?

Answer 1

I'd use the kinematic equation:
v^2 = v^2 + 2as, where
a is gravity
s is the distance fallen [given]
and the v on the left is the speed of the the object after falling 490meters
and the v on the right is the initial speed, which in our case will be zero, because the question says, 'the object falls from free falll'