how do you calculate this physics question!?

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kalindi

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a ball is thrown vertically upward from a window that is 3.6 m above the ground. THat ball's initial speed is 2.8m/s and the acceleration due to gravity is 9.8 m/s².
what is the ball's speed when it hits the ground?- now if the ball was dropped from the same height ( instead of throwing it upward) would it be the same speed?
 
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