Question

at what point of the projectile path the speed is minimum? at which point maximum

Answer 1

it is minimum at the highest point and maximum when it is launched.

Answer 2

In a Trajectory the projectile would have Minimum velocity at Trajectory point ( At the maximum height ) . & Possess Maximum velocity at initial projection point (due to initial acceleration) & at the point when projectile hits the ground . (due to acceleration of Gravity ) . In both case velocity is maximum when height is minimum .