Question

A ball is dropped from rest and falls for 5 s. What are its position and velocity at that instant?

So the variables I can define are v1=0, v2= x t=5

Other than that I don't know what to do in this problem. I'm assuming position is the height so I'm looking for height and final velocity?

Answer 1

height=initialheight+initiavleocity*time + 1/2 g time^2
height=initialheight-1/2 9.8 *25
yes, do velocity the same way.

Answer 2

How would I know what the initial height is?

Answer 3

actually, i got 122.5 m for the position

Answer 4

and 49 m/s for the final velocity

Answer 5

Ok, then the position is 122.5 m below the initial position, and yes, on the velocity.