Kinematics Question 685
Question: At the top of the trajectory of a projectile, the directions of it’s velocity and acceleration are
Options:
A) Perpendicular to each other
B) Parallel to each other
C) Inclined to each other at an angle of$ 45^{o} $
D) Antiparallel to each other
Show Answer
Answer:
Correct Answer: A
Solution:
[a] Direction of velocity is always tangent to the path so at the top of trajectory, it’s in horizontal direction and acceleration due to gravity is always in vertically downward direction. It means angle between $ \vec{v} $ and $ \vec{g} $ are perpendicular to each other.
