Homework Help: PHYSICS

Posted by GRISSELL on Saturday, February 4, 2012 at 9:57pm.

A pebble is tossed off a skyscraper and reaches the groung 7.65 seconds later. How tall is this building?

7.65 s x 9.8 m/s^2 = 74.97 meters?????

Not sure if I did this right? Thanks

PHYSICS - drwls, Saturday, February 4, 2012 at 10:03pm
It is wrong.
It falls (g/2)t^2, not g*t

g*t is the final velocity

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