The kinetic energy of a body of mass $2 kg $ and momentum of $2 Ns$ is ............. $\mathrm{J}$
$1$
$2 $
$3$
$4 $
An athlete in the olympic games covers a distance of $100\ m$ in $10\ s$. His kinetic energy can be estimated to be in the range
An object of $1 \,kg$ mass has a momentum of $10 \,kg$ $m/sec $ then the kinetic energy of the object will be .............. $\mathrm{J}$
If the kinetic energy of a moving body becomes four times its initial kinetic energy, then the percentage change in its momentum will be $...\%$
At time $t=0$ is particle starts moving along the $x-$axis. If its kinetic energy increases uniformly with time $t$, the net force acting on it must be proportional to
A stationary particle explodes into two particles of a masses $m_1$ and $m_2$ which move in opposite directions with velocities ${v_1}$ and ${v_2}.$ The ratio of their kinetic energies ${E_1}/{E_2}$ is