3 years ago

You drop a rock off the top of a building. It takes 4.5 s to hit the ground. How tall is

1 answer:

4 0

Since the rock as been dropped off the building you can assume that initial velocity equals 0m/s.

t=4.5s
acceleration due to gravity=9.8m/s^2

s=ut+1/2at^2

Since u=0, s=1/2at^2

s=1/2(9.8)(4.5)^
s=99.225m

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