Physics education research, electronic materials, and the musings of Christopher Moore, Ph.D.
Physics education research, electronic materials, and the musings of Christopher Moore, Ph.D.
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a penny is dropped from a 700 ft. high bridge. a) how long does it take for the penny to reach the ground below? b) what is the velocity of the penny upon impact?
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use these:
a)
a=9.8m/s^2 (acceleration due to gravity)
s=ut + .5at^2 where s is final displacement (700ft... convert this to meters), u is initial displacemet =0
solve for t
b)
v=at since it is dropped from rest
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Except that ignores air resistance, which assuming this is not just a homework question and it didn't say "and ignore air resistance," it's going to matter a lot.
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