two unequal masses have the same kinetic energy . prove that momentum of heavier body is more. and the momentum of a body increased by 20%.calculate the percentage increase in its kinetic energy.

Asked by  | 9th Feb, 2012, 08:38: PM

Expert Answer:

p, momentum = mXv
m is the mass and v is the velocity,
 
Hence, p is directly proportional to mass of the object.
 
If momentum increases by 20%, then the mass also has increased by 20%.
KE = 1/2 mv^2, KE is directly proportional to mass.
 
mass increases by 20%, KE also increase by 20%.

Answered by  | 9th Feb, 2012, 09:58: PM

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