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

Two bodies of masses $1 \ g$ and $9 \ g$ have equal kinetic energy. The ratio of their momenta is:

Two bodies of masses $m$ and $2m$ have the same momentum. Their respective kinetic energies $E_1$ and $E_2$ are in the ratio:

Two particles of masses $m_{1}$ and $m_{2}$ have equal kinetic energies. The ratio of their momentum is

$A$ 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:

What is the kinetic energy in Joules of a bullet of mass $2 \, g$ moving with a velocity of $500 \, m/s$ (in $, J$)?