February 19, 2017

Homework Help: science

Posted by katie on Friday, May 23, 2014 at 4:18pm.

A rock tumbles straight down from a cliff, its moving at 20 m/s when it hits. What is the height of the cliff? The mass of the rock is 8 kg.
a) 2.5 m
b) 400 m
C) 20.4 m
d) 160 m

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