The direction of velocity and acceleration of a projectile at the highest point on the trajectory are

What is the angle between directions of velocity and acceleration at the highest point of trajectory of projectile?

What is the acceleration of a projectile at the top of its trajectory ?

The kinetic energy of a projectile at the highest point is-

The angle between the direction of velocity and acceleration at the highest point of a projectile path is______ .

What is the velocity of a projectile at the highest point?

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