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Unformatted text preview: Ans2.) We know that, = + v1 v02 2gh Therefore when a ball is dropped with an initial velocity of vo, the final velocity will just increase. If a ball is thrown upwards with an initial velocity it will reach a maximum height where the object will stay steady for a moment. This maximum height attained is: = height v022g Conservation of mechanical energy = KE + PE = KE + PE Where KE= Kinetic Energy PE=Potential Energy So when the ball is thrown with initial velocity, it has slight KE and lots of PE. When a ball is thrown from down with initial velocity it has lots of KE and not much PE. Since they are thrown at same initial velocities but one is against gravity and one is along with gravity. The speeds with which they reach the ground are different....
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 Fall '09
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 Friction, Mass

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