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

Two bodies having kinetic energy in the ratio $4: 1$ are moving with the same linear velocity. The ratio of their masses is

Two bodies of masses $m_1$ and $m_2$ are moving with the same kinetic energy. If $P_1$ and $P_2$ are their respective momenta,the ratio $\frac{P_1}{P_2}$ is equal to:

If the momentum of a body of mass $m$ is increased by $20 \%$,then its kinetic energy increases by: (in $\%$)

The masses of two substances are $4 \text{ g}$ and $9 \text{ g}$ respectively. If their kinetic energies are the same,then the ratio of their momenta will be

$A$ man who is running has half the kinetic energy of a boy of half his mass. The man speeds up by $1 \,ms^{-1}$ and then has the same kinetic energy as the boy. The initial speed of the boy is