Which one of the following statements is not true about the motion of a projectile?
Which one of the following statements is not true about the motion of a projectile?
- A
The time of flight of a projectile is proportional to the speed with which it is projected at a given angle of projection
- B
The horizontal range of a projectile is proportional to the square root of the speed with which it is projected
- C
For a given speed of projection, the angle of projection for maximum range is $45^{\circ}$
- D
At maximum height, the acceleration due to gravity is perpendicular to the velocity of the projectile
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