A rock is thrown 0.8 meters into the air. Find how fast it was thrown

asked Dec 11, 2017 123k views

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2 votes

g = -10 m/s
s = 0.8 m
v = 0
u = ?

2as = v² - u²
-16 = - u²
u² = 16
u = 4 m/s

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