1-2-3 Ground Launched Projectiles

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Presentation transcript:

1-2-3 Ground Launched Projectiles Fire Away!!! 1-2-3 Ground Launched Projectiles

What is a projectile? A flying object with no means of propulsion after its launch. Can be launched with any VELOCITY and at ANY ANGLE May be subjected to AIR RESISTANCE

Initial velocity 12 m/s 30° What is the horizontal part of the soccer ball’s initial velocity? What is the vertical part of the soccer ball’s initial velocity? vix = vi cos θ viy = vi sin θ 12 m/s 6 m/s 30° 10.4 m/s

What assumptions can we make? Horizontal Initial velocity = vi cos θ Acceleration = 0 Vertical Initial velocity = vi sin θ Acceleration = -9.81 m/s2 Vertical speed = 0 at top

Projectile Vector Diagram vfy = 0 (at top) x y a = 0 a = -9.81 m/s2 vi = vi cos θ vi = vi sin θ vf = 0 (at top) ttot = 2t1/2 ttot