Projectile Motion Notes

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By: Nahdir Austin Honors Physics Period 2

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Presentation transcript:

Projectile Motion Notes

What is a projectile? A projectile is any object which once projected or dropped continues in motion by its own inertia and is influenced only by the downward force of gravity.

An object dropped from rest is a projectile (provided that the influence of air resistance is negligible). An object which is thrown vertically upward is also a projectile (provided that the influence of air resistance is negligible). An object is which thrown upward at an angle to the horizontal is also a projectile (provided that the influence of air resistance is negligible).

Projectile Motion

Projectile Motion

Characteristics of a Projectile's Trajectory Many projectiles not only undergo a vertical motion, but also undergo a horizontal motion. That is, as they move upward or downward they are also moving horizontally. There are the two components of the projectile's motion – horizontal and vertical motion.

Horizontally Launched Projectiles Consider a cannonball projected horizontally by a cannon from the top of a very high cliff. The projectile travels with a constant horizontal velocity and a downward vertical acceleration.

Non-Horizontally Launched Projectiles Consider the cannon is aimed upward and shot at an angle to the horizontal from the same cliff. The projectile would travel with a parabolic trajectory.

Practice Suppose a rescue airplane drops a relief package while it is moving with a constant horizontal speed at an elevated height. Assuming that air resistance is negligible, where will the relief package land relative to the plane?