a stone is dropped from a height of 20 m .
(a) how long will it take to reach the ground ?
(b) what will be its speed when it hits the ground ? (g= 10ms-2)
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2 v^2=u^2 +2as where u=0 and a =10 s=20 after finding v
apply 1 equation v=u+at
apply 1 equation v=u+at
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