Asked by calley

you drop a penny off the roof and it htis the water 4.2 seconds later, what is the height of the bridge?
Answered by drwls
Y = (g/2)*t^2 is the distance it falls in time t, neglecting air restance.

g = 9.8 m/s^2 is the acceleration of gravity.

Answered by drwls
I don't quite see how a roof, a bridge and the water below are related. Is the roof higher than the bridge?
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