Four particles $A, B, C, D$ of mass $\frac{m}{2}, m, 2m, 4m$ have the same momentum,respectively. The particle with maximum kinetic energy is:

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

$A$ light body of momentum $P_L$ and a heavy body of momentum $P_H$,both have the same kinetic energy,then:

$A$ man increases his speed by $2 \ m/s$, and as a result, his kinetic energy doubles. What was his initial speed?

$A$ boy is rolling a $0.5\, kg$ ball on a frictionless floor with a speed of $20\, ms^{-1}$. The ball gets deflected by an obstacle on the way. After deflection,it moves with $5\%$ of its initial kinetic energy. What is the speed of the ball now? (in $ms^{-1}$)

If the momentum of a body is increased $n$ times,its kinetic energy increases by a factor of: