If momentum of an object is increased by 10%,then its kinetic energy will b increased by--?
using relation:
E=P 2/2m
let pi= initial momentum
then according to question,final momentum pf=10% of pi+pi
=11pi/10
initial kinetic energy Ei=Pi2/2m
final kinetic energy Ef=Pf2/2m=(11pi/10)2/2m
=121pi2/200m
so change in kinetic energy = Ef – Ei
= (121Pi2/200m) - (Pi2 /2m)
= 21Pi2/200m
= 21/200(Pi2/2m)
= 21% of Ei
so, the kinetic energy increases by 21% when momentum increases by 10%
@Anushree....Very nicely done, thanks for the help!