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

An object of $1 \, kg$ mass has a momentum of $10 \, kg \cdot m/s$. Then,the kinetic energy of the object will be .............. $J$.

When the momentum of a body increases by $100\%$,its $KE$ increases by .............. $\%$

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

If the kinetic energy of an object becomes four times its initial value,what will be its new momentum?

$A$ bullet of mass $50 \ g$ is fired with a speed $100 \ m/s$ on a plywood and emerges with $40 \ m/s$. The percentage loss of kinetic energy is: