February 23, 2017

Homework Help: Physics

Posted by Hayli on Monday, February 20, 2012 at 10:22am.

Isaac pushes rock, of a mass of 20kg, if from a cliff and it falls into the lake below. The cliff was 3m above the water. (Assume no air resistance)
a. How much time did it take the rock to hit the water?
b. What was its velocity when it was half of the distance to the water?

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