Homework Help: Physical Science

Posted by Brody on Sunday, January 29, 2012 at 8:03pm.

If there were no air resistance, a quarter dropped from the top of New York's empire state building would reach the ground 9.6 seconds later, what would its speed be? How high is the building?

Physical Science - DrBob222, Sunday, January 29, 2012 at 9:02pm
distance = 1/2*g*t^2

velocity = g*t
Physical Science - Brody, Sunday, January 29, 2012 at 9:10pm
I don't know how to use those formulas to figure out what the speed and how high the building would be ?
Physical Science - DrBob222, Sunday, January 29, 2012 at 9:18pm
distance = 1/2*g*t^2
distance is what you want.
1/2 is obvious.
g = 9.8 meters/secnd/second
t = time = 9.6 seconds in the problem. Solve for d.
Physical Science - Brody, Sunday, January 29, 2012 at 9:23pm
Okay, thank you! I'm pretty sure I got it! What about to know how high the building is though? Sorry if you already answered that too, I am awful with this kind of stuff
Physical Science - DrBob222, Sunday, January 29, 2012 at 9:27pm
The distance IS how high.

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