1.

If momentum is increased by 20% then kinetic energy increases by

Answer» Kinetic energy (E) is related with momentum (p) of a body of mass m as follows

E=p^2/(2m)

Let initial momentum be p .Then on 20% increase the changed momentum

p'=120/100p=6/5p

So  E' =p'^2/(2m)=(36/25)p^2/(2m)

=>E'/E=36/25

So percentage increase in KE

=(E'-E)/E×100=(36-25)/25×100%=44%


Discussion

No Comment Found

Related InterviewSolutions