Homework Help: physics

Posted by Adam on Tuesday, November 9, 2010 at 6:49pm.

A boulder with a mass of 2,500 kg on a ledge 200 m above the ground falls. If the boulder's mechanical energy is conserved, what is the speed of the boulder just before it hits the ground?

physics - bobpursley, Tuesday, November 9, 2010 at 6:52pm
1/2 m vf^2=m*g*height
solve for vf

notice mass divides out.

vf=sqrt(2gh)
physics - Adam, Tuesday, November 9, 2010 at 6:58pm
How do you figure miles per hour?
physics - bobpursley, Tuesday, November 9, 2010 at 7:27pm
what do you mean, Adam?
physics - Adam, Tuesday, November 9, 2010 at 7:34pm
I meant meters per second
physics - 1, Friday, January 25, 2013 at 4:28pm
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physics - -1', Friday, January 25, 2013 at 4:28pm
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-1' - 1, Friday, January 25, 2013 at 4:28pm
1
physics - 1, Friday, January 25, 2013 at 4:28pm
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