Question

At the maximum height of a projectile, the velocity and acceleration are

• A. parallel to each other
• B. antiparallel to each other
• C. perpendicular to each other
• D. inclined to each other at $45^\circ$

Answer 1

Answer: (C)

perpendicular to each other

Answer 2

At maximum height ; $v _{ x }= v _{ x } \cos \theta$ in horizontal direction and $v _{ y }=0$ $a _{ x }=0, a _{ y }=- g$ Clearly angle between them is $90^{\circ}$.