Projectile: - An object thrown into space either horizontally or an acute angle under the action under gravity is called a projectile. There are forces which act on a projectile – gravitational force and air resistance. Air resistance of an object varies greatly and it depends on the objects particular shape and the atmospheric conditions in which the object is released. The factor affecting projectile trajectory are mentioned below.


The angle of projection: - An object which is projected at different angles covers different distances. When it is projected or released at an angle of 30, making it a parabolic path and covers lesser distance. When it is projected at 60, it covers a distance of less than 30. When it is released at an angle of 45, makes a parabolic path and covers maximum distance. So the distance cover by an object( shout-put, hammer, javelin, discus etc. depends on the angle of release 0f projectile).