A particle of mass $m_1$ is moving with a velocity $v_1$ and another particle of mass $m_2$ is moving with a velocity $v_2$ . Both of them have the same momentum but their different kinetic energies are $E_1$ and $E_2$ respectively. If $m_1 > m_2$ then
$E_1 < E_2$
$\frac{{{E_1}}}{{{E_2}}}\, = \,\frac{{{m_1}}}{{{m_2}}}$
$E_1 > E_2$
$E_1 = E_2$
A bomb of mass $9\,kg$ explodes into $2$ pieces of mass $3\,kg$ and $6\,kg.$ The velocity of mass $3\,kg$ is $1.6\, m/s$, the K.E. of mass $6\,kg$ is ............ $J$
A light and a heavy body have equal kinetic energy. Which one has a greater momentum ?
If the kinetic energy of a moving body becomes four times its initial kinetic energy, then the percentage change in its momentum will be $...\%$
A body of mass $5\,kg$ is moving with a momentum of $10\,kg\,ms ^{-1}$. Now a force of $2\,N$ acts on the body in the direction of its motion for $5\,s$. The increase in the Kinetic energy of the body is $...........J$.
A rifle bullet loses $1/20^{th}$ of its velocity in passing through a wooden plank. The least number of planks required to stop the bullet is :-