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Projectile Motion
Physics Chapter 3 Section 3.3
Projectile Motion --A projectile is an object thrown into the air!
with some initial horizontal velocity, and then!falls under the influence of gravity. !
--The path followed by a projectile is a parabola.!
--Examples of projectiles include:
baseballs! golf balls!long jumpers! arrows!
--If air resistance is small enough to be ignored,!the horizontal component of the projectiles!velocity will remain constant. !
--The vertical component will accelerate at the!rate of g = -9.81 m/s2.
--The resultant velocity of the projectile at any!given time can be found by adding the!horizontal (x) and vertical (y) components.
Projectile Motion and Free Fall --A projectile is an object in free fall with an!
initial horizontal velocity.!
--A projectile will hit the ground at the same!time as an object that is dropped straight!down from the same height and at the same!time.!
Mathematical Solutions to Projectile Motion Problems
The horizontal component may be found from:!
€
Δx = vxΔtvx = vx,i
The vertical component may be found from:!
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Δy = −12g(Δt)2
vy, f = −gΔt
vy, f2 = −2gΔy
Example: What is the vertical and horizontal distance traveled by a projectile whose initial horizontal velocity is 5.0 m/s after 5.0 s?
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