There is a simple formula as derived from the theory of Torricelli in which if there is no friction, consider it as free falling body. Of course since it is going down as free falling, the gravitational acceleration (g = 9.81 m/sec^2) will be considered.
Solving for velocity :
v^2 = 2gh
v = (2gh)^1/2
V=(2×9.81×10)^1/2
