If the momentum of a body is increased $n$ times, its kinetic energy increases
$n$ times
$2n$ times
$\sqrt n $times
${n^2}$ times
The energy required to break one bond in $DNA$ is $10^{-20}\, J.$ This value in $eV$ is nearly
A particle of mass $ M$ is moving in a horizontal circle of radius $R$ with uniform speed $V$. When it moves from one point to a diametrically opposite point, its
Two masses of $1 \,gm$ and $4 \,gm$ are moving with equal kinetic energies. The ratio of the magnitudes of their linear momenta is
A car travelling at a speed of $30\, km/hour$ is brought to a halt in $8\, m$ by applying brakes. If the same car is travelling at $60 \,km/hour$, it can be brought to a halt with the same braking force in ............... $\mathrm{m}$
If momentum is increased by $20\%$ , then K.E. increases by ........... $\%$