Question

what is the velocity of a projectile at maximum height

Answer 1

The maximum height of projectile is when it reaches zero vertically velocity.

Answer 2

It is the maximum vertical distance covered by projectile...it can be calculated by using 3 equation of motion ......2as = VF2 _ vi2
FOR Y Component .2ayH = vfy2 _ viy2
2 ( _ g ) H = 0 _ ( vi sin Q .Thitha ) 2
_ 2gh = _ vi2 siN 2Q
H = vi2 sin2Qdivided by 2g
H = vi2 (1) / 2g
H = vi2 / 2g