At the appermost point of a projectile its velocity and acceleration are at an angle of:

Options

A. `0^(@) `
B. `90^(@)`
C. `45^(@)`
D. `180^(@)`

Answer

B

Explanation

At the uppermost point of a projectile, the vertical component of the velocity of projection become zero, while the horizontal component remains constant . And the acceleration ( due to gravity ) is always vertically downwards . Therefore at the uppermost point of a projectile, its velocity and acceleration are at an angle of ` 90^(@)` .