question_answer

At the top of the trajectory of a projectile, the directions of its velocity and acceleration are :

A)  perpendicular to each other

B)  parallel to each other

C)  inclined to each other at an angle of 45°

D)  antiparallel to each other

Correct Answer: A

Solution :

                At the highest point of the trajectory of a projectile, only the horizontal component of velocity exists while vertical component is zero. Also, acceleration due to gravity acts vertically downwards, hence at the top of the trajectory of a projectile, the direction of its velocity and acceleration are perpendicular to each other.