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 ............... $\mathrm{m}$

particle is projected from level ground. Its kinetic energy $K$ changes due to gravity so $\frac{{{K_{\max }}}}{{{K_{\min }}}} = 9$. The ratio of the range to the maximum height attained during its flight is

A bomb of $12 kg$ divides in two parts whose ratio of masses is $1 : 3$. If kinetic energy of smaller part is $216 J$, then momentum of bigger part in kg-m/sec will be

An object of $1 \,kg$ mass has a momentum of $10 \,kg$ $m/sec $ then the kinetic energy of the object will be .............. $\mathrm{J}$

A particle of mass $'m'$ and charge $'q'$ is accelerated through a potential difference of $'V'$ volt. Its energy is

If the kinetic energy of a body becomes four times of its initial value, then new momentum will