Projectile Motion Projectile motion is independent vertical and horizontal motion through the air only under the influence of gravity after a having an initial horizontal velocity. Two dimensional motion is any movement of an object that occurs both horizontally and vertically Projectile – an object with independent vertical and horizontal motion that moves through the air only under the influence of gravity after a having an initial horizontal velocity. Trajectory – the path the projectile follows (what shape is it?) Like vectors, the horizontal and vertical velocities of a projectile are independent.

Which bullet hits first? Projectile Motion Which bullet hits first?

Projectile motion variables Vx  the velocity in the horizontal (x) direction ∆dx  the distance in the horizontal (x) direction Vy ↓ the velocity in the vertical (y) direction ∆dy ↓ the distance in the vertical (y) direction t is still time a(g) is still -9.81 m/s2 for vertical (gravity) ∆dx = Vx(t) is the speed equation for horizontal motion Fantastic four equations can also be used

Half Projectiles Horizontal calculations: ∆dx, Vx, and t Using ∆dx = Vx(t) Vertical calculations: ∆dy, Vy, a, t Using fantastic four

What are the parts of projectile motion? Vertical motion Horizontal motion

Projectile Motion A stone is rolled horizontally at 15 m/s from the top of a 100m cliff. How long does it take to reach the bottom? How far from the base of the cliff does it strike the ground Sketch the trajectory

Projectile Motion