Answer:
When velocity of aeroplane is made twice, its
momentum will become twice.
The momentum of plane and that of air will remain conserved. This
is because when momentum of plane becomes twice, the momentum of air in the
opposite direction will also become twice. (b) K.E. of the plane will become
four times. The additional energy will be obtained from the burning of the fuel
of the plane. Total energy shall remain conserved.
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