Free fall

How long does the stone fall freely into a depth of 80m? What speed will it hit the bottom of the abyss?

Correct answer:

t =  4.0386 s
v =  39.6182 m/s

Step-by-step explanation:

s= 21 g t2 g=9.81 m/s2 s=80 m t=g2 s=9.812 80=4.0386 s
v=g t=9.81 4.0386=39.6182 m/s



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