Posted by **Kamogelo** on Thursday, April 26, 2012 at 1:35pm.

Assume g is 10 metres per second and there is no air resistance.A rock falls fromm a height of 45 metres.How long does it take to reach the ground? and What is the velocity as it hits the ground?

- Physics -
**Elena**, Thursday, April 26, 2012 at 6:32pm
h=gt^2/2

v=gt

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