Projectile Motion

• 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
• Force: Push or Pull (strength or energy)