A girl is standing at the edge of a cliff 100. m above the ground. She reaches out over the edge of the cliff and throws a rock straight upward
with a speed 8.00 m/s.
a) How long does it take the rock to hit the ground?
b) What is the speed of the rock the instant before it hits the ground?
I think the answers are:
a) 6.4s
b) 45.0m
a)
b)
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