SOLUTION: You drop a penny from a 70-foot high bridge. How long does it take for the penny to hit the water below? Neglect the effect of air resistance, round to the nearest 1/10 second an

Algebra ->  Test -> SOLUTION: You drop a penny from a 70-foot high bridge. How long does it take for the penny to hit the water below? Neglect the effect of air resistance, round to the nearest 1/10 second an      Log On


   



Question 324656: You drop a penny from a 70-foot high bridge. How long does it take for the penny to hit the water below? Neglect the effect of air resistance, round to the nearest 1/10 second and express your answer like: 7.5 s.

Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
h=%281%2F2%29gt%5E2
g=32.2 ft/s^2
70=%281%2F2%2932.2t%5E2
t%5E2=4.35+
t=2.09 sec