Answer to Question #78324 in Physics for Katie

Question #78324
A box is dropped from an 8.45 m bridge
Calculate the speed of the box just before it hits the ground.
1
Expert's answer
2018-06-18T09:57:08-0400
From the conservation of energy:
(mv^2)/2=mgh
v^2/2=gh
The speed of the box just before it hits the ground:
v=√2gh=√(2(9.8)(8.45))=12.9 m/s.

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