Projectile motion is a motion in which an object is thrown near the earth’s surface, and it moves along the curved path under the action of gravity only.
Any object which is projected in the air is called as projectile.
The point from which the object is projected in air is called as point of projection.
The velocity with which an object is projected in air is called as velocity of projection.
The parabolic path followed by a projectile in air is called its trajectory.
Time taken by the projectile to cover the entire trajectory is called as time of flight.
It is the maximum vertical distance travelled by the projectile from the ground level during its motion.
It is the horizontal distance travelled by the projectile during entire motion.
Sir Isaac Newton (1643-1727) an English scientist and mathematician famous for his discovery of the law of gravity also discovered the three laws of motion.
Newton's First Law:
Obiects in motion tend to stay in motion and objects at rest tend to stay at rest unless acted upon by an unbalanced force.
Newton's Second Law:
Force equals mass times acceleration (F = ma).
Newton's Third Law:
For every action there is an equal and opposite reaction.
Acceleration: a measurement of how quickly a n object is changing speed.
Force is directly proportional to m a s s a n d acceleration.
Imagine a ball of a certain mass moving at a certain acceleration.
nertia: the tendency of an object to resist changes in its state of motion
Velocity: The rate of change of a position along a straight line with respect to time