1. Angle of projection: Any object when projected at different angles covers different distance. When it is projected or released at the angle of 300 making a parabolic path, it covers less distance. When it is projected at the angle of 600 , it covers a distance less than the distance covered by 300 angle. When it is released at the angle of 450 making a parabolic path it covers the maximum distance. Here it is supposed that the initial velocity in all the case is same.
2. Initial Velocity: The distance covered by an object depends on the initial velocity of the projectile. If the initial velocity is more the object covers maximum distance. On the other hand, if initial velocity is less, the object covers less distance.
3. Gravity: It is the force of attraction exerted by the earth towards its centre on a body or an object. The greater the weight of an object the greater the influence of gravity upon it. Gravity affects a projectile as it decreases the height of projectile can obtain.
