A Physics book , mass unknown , is dropped from a table . its velocity just before hitting the ground is 9.39 m/s . what is the height of the table ?
(1/2)MV^2 = M g H
H = V^2/(2*g)
M cancels out, so you don't need it.
H = V^2/(2*g)
M cancels out, so you don't need it.