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Unformatted text preview: Newtons 2nd Law It tells us how much acceleration an object has and depends on the objects mass as well as the force on the object. acceleration = force mass Be careful: g = 9.8N/kg and for free fall a = 9.8m/s 2 but it is dangerous to think of g as an acceleration. More on this later. a = W/m = mg/m = g a = g in number, not in concept! Projectile Motion Example: An object is thrown straight up with a velocity of 4m/s. The acceleration is 9.8m/s 2 directed down. How long is the object in the air? How high does it get? What is its velocity when it gets back to the ground?...
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 Fall '08
 LarryWatson
 Physics, Projectile Motion

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