Which one of following statements is not true about motion of a projectile?

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3-2.Motion in Plane

easy

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

Solution

(b)

$R=\frac{u^2 \sin 2 \theta}{g} \Rightarrow R \propto u^2$

Standard 11

Physics

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