Two masses of $1 \,gm$ and $4 \,gm$ are moving with equal kinetic energies. The ratio of the magnitudes of their linear momenta is
$4:1$
$\sqrt 2 :1$
$1:2$
$1:16$
Consider a car moving on a straight road with a speed of $100\, m/s$. The distance at which car can be stopped is ........ $m.$ $[{\mu _k} = 0.5]$
If the K.E. of a particle is doubled, then its momentum will
A particle of mass $0.1 \,kg$ is subjected to a force which varies with distance as shown. If it starts its journey from rest at $x=0$, then its velocity at $x=12 \,m$ is .............. $m / s$
The adjoining diagram shows the velocity versus time plot for a particle. The work done by the force on the particle is positive from
The energy which an ${e^ - }$ acquires when accelerated through a potential difference of $1 \,volt$ is called