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Title: What is the ratio of the man's kinetic energy to that of the woman ? Post by: lenaclaire on Feb 13, 2013 A man weighing 660 and a woman weighing 400 have the same momentum. What is the ratio of the man's kinetic energy to that of the woman ?
Title: What is the ratio of the man's kinetic energy to that of the woman ? Post by: smnam on Feb 13, 2013 p = mv
and Ek = 1/2 m v^2 = m^2 v^2 /(2m) = p^2 /2m Hence if the objects have the same momentum, p and p^2 are identical and the Kinetic energy is proportional to the inverse of the mass so Ek man/ Ek woman = mass woman / mass man = 400/660 Title: What is the ratio of the man's kinetic energy to that of the woman ? Post by: tony123 on Feb 13, 2013 Content hidden
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