(a) Projectile motion: When a particle is projected obliquely near the earth surface, it moves simultaneously in horizontal and vertical directions. This type of motion is called projectile motion.
Where, u = projected speed
θ = angle at which an object is thrown from the ground.
g = acceleration due to gravity = 9.8 m/s2
Maximum Range: It is the longest distance covered by the object during projectile motion.
When the angle of projection is 45°, the maximum range is obtained.
(b) The motion of the cricket ball in air is essentially a projectile motion. As we have already seen, the range (horizontal distance) of the projectile motion is given by
This distance is greater than the distance of the boundary line. Hence the ball will cross this line and go for a six.