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Projectile Motion

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Definition this type of motion involves a combination of uniform and accelerated motion When an object is thrown horizontally from a height, the object appears to undergo 2 types of motion 1. Vertical accelerated motion of free-fall 2. Horizontal motion which is uniform motion

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Projectile Motion - Vertical accelerated motion - Horizontal uniform motion

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Projectile Motion The vertical displacement is called the height The horizontal displacement is called the range The two types of motion act independently of each other

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Examples Any object thrown in the air

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Solving Projectile Problems Find the vertical “ ” and horizontal “ ” components of the initial velocity Use the initial “ ”, and the free-fall formula to solve questions concerning the vertical aspect of the motion Use the initial “ ”, and the uniform motion formula to solve questions concerning the horizontal aspect of the motion.

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Initial vertical velocity - Zero V = 20.0 m/s horizontal Strikes ground in 5.00 s

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Initial vertical velocity - Positive V = 20.0 m/s at 30.0 o upwards Strikes ground in 5.00 s

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Initial vertical velocity - Negative V = 20.0 m/s at 30.0 o upwards Strikes ground in 5.00 s

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Assumptions the free-fall acceleration g is constant over the range of motion and is directed downward The effect of air resistance is negligible http://www.walter- fendt.de/ph11e/projectile.htm http://www.walter- fendt.de/ph11e/projectile.htm

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