Projectile Motion An Application Activity Projectile Motion When

Projectile Motion An Application Activity

Projectile Motion When an object is dropped, it falls a distance of {( -16 feet) or (-9. 81 meters)}t 2 in t seconds. This is the force of gravity on any given object.

Projectile Motion What happens to a projectile that is launched with some initial vertical velocity, v 0, (measured in distance units per second at some initial height h 0 (measured in distances units).

Projectile Motion • Horizontal motion is uniform, and independent of vertical motion. • Vertical motion is free fall, and independent of horizontal motion.

Projectile Motion You know that a dropped object falls a distance of 16 t 2 feet in t seconds. When an object is not simply released but is thrown or launched, it is called a projectile. What happens to a projectile that is launched with some initial vertical velocity, Vo (measured in feet per second), at some initial height ho (measured in feet).

Projectile Motion • Without gravity to pull the projectile its height h Would increase according to the equation h = vo t + ho • With gravity, the projectile falls 16 t 2 feet in t seconds. • So the projectile’s height at any time t is given by H = -16 t 2 + v 0 t + h 0

Projectile Motion For a tennis ball, a baseball, and a model rocket, Find, • the maximum height, • the time it reached that height and • the time the object returns to earth given the following velocities and starting heights

Projectile Motion h(t) = {(-16 ft) or (-9. 81 m)}t 2 + v 0 t + h 0 Tennis ball h 0 = 0. 8 m, v 0 =34. 7 m/sec h 0 = 1. 0 m, v 0 =27. 3 m/sec Baseball h 0 = 3. 4 ft. , v 0 =101 mph h 0 = 2. 7 ft, v 0=80. 67 ft/sec Model Rocket h 0 = 0. 4 ft. , v 0 =670 ft/sec h 0 = 2. 4 ft. , v 0 =490 ft/sec