Projectile Motion

With a projectile, after the initial force which is used to set the object in motion, the only force of significance acting on the projectile is the force due to gravity.The horizontal and vertical motions are independent of each other.Horizontally there is no force acting on the object and the object continues in a state of uniform motion in a straight line(Newton's 1st Law).The velocity is constant and the acceleration is zero and the displacement can be described with the equation:s = u tor displacement = velocity × timeVertically the only force acting on the object is the force due to gravity. The acceleration is always g downwards, whether the object is moving up or down; taking upwards as positive, the acceleration is -g. At maximum height the vertical velocity = 0 and the object stops rising before changing direction, while its horizontal velocity continues unchanged. The time of flight of the object is the time from the moment it is projected to the time it hits the ground and stops moving. The time of flight determines the horizontal range of the object.