A ball rolls over the edge of a table with a horizontal velocity v m/s. the height of the table is 2.1m and the horizontal range of the ball from the base of the table is 16m. What is the initial speed of the ball?

Answer 1

The real question is how long does it take anything to fall to the floor from a 2.1 meter table

h = (1/2) g t^2
2.1 = 4.9 t^2

solve for t

then
16 = u * t