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
(B) The horizontal range of a projectile is maximum when angle of projection is 45° for a given speed
(C) The average acceleration for any time interval is varying.
(D) At maximum height the acceleration due to gravity is perpendicular to the velocity of the projectile.
(A) The time of flight of a projectile is proportional to the speed with which it is projected
(B) The horizontal range of a projectile is maximum when angle of projection is 45° for a given speed
(C) The average acceleration for any time interval is varying.
(D) At maximum height the acceleration due to gravity is perpendicular to the velocity of the projectile.