If $E - V < 0$,is this condition possible?

If the velocity of a body is twice its previous velocity,then its kinetic energy will become:

If the momentum increases by $0.01\%$,what is the percentage increase in kinetic energy (in $\%$)?

If the momentum of a body increases by $0.01\%$,its kinetic energy will increase by ........... $\%$

Two bodies of masses $m$ and $4m$ are moving with equal kinetic energy $(K.E.)$. The ratio of their linear momentums is

Three bodies $A, B$ and $C$ have equal kinetic energies and their masses are $400 \,g, 1.2 \,kg$ and $1.6 \,kg$ respectively. The ratio of their linear momenta is: