The direction of the oblique projectile becomes horizontal at the maximum height. What is the cause of it ?

Why the motion of oblique projectile becomes horizontal at the highest point?

Why does the direction of a projectile become horizontal at the highest point of its trajectory?

At what point during motion the projectile becomes horizontal ?

Mention the direction of motion of the projectile at the point of its maximum height .

Mention the direction of motion of the projectile at the point of its maximum height .

Find the angle of projection of a projectile for which the horizontal range and the maximum height are equal.