If two bodies of masses $m_1$ and $m_2$ have the same kinetic energy,what is the ratio of their momenta?

$A$ running man has half the kinetic energy of a boy who has half the man's mass. The man speeds up by $1 \, m/s$ so that his kinetic energy becomes equal to that of the boy. The original speed of the man is:

$A$ particle is initially at rest on a frictionless horizontal surface. $A$ force of constant magnitude and direction is applied to it. The graph shows the work done $(W)$ on the particle versus its speed $(v)$. If no other horizontal forces act on the particle,what should the graph look like?

When the mass and speed of the body are doubled,the kinetic energy of the body

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

The kinetic energy of an object decreases by $19\%$. What is the percentage decrease in its momentum?