Two bodies with masses $M_1$ and $M_2$ have equal kinetic energies. If $p_1$ and $p_2$ are their respective momenta, then $p_1/p_2$ is equal to
$M_1 : M_2$
$M_2 : M$
$M_1^2:M_2^2$
$\sqrt {{M_1}} :\sqrt {{M_2}} $
A ball $P$ collides with another identical ball $Q$ at rest. For what value of coefficient of restitution $e$, the velocity of ball $Q$ become two times that of ball $P$ after collision
In the figure shown the potential energy $(U)$ of a particle is plotted against its position $'x'$ from origin. The particle at
In one dimensional case, the relationship between force and position is shown in the figure. The work done by the force in displacing a body from $x = 1\, cm$ to $x = 5\, cm$ is ............ $\mathrm{ergs}$
A body at rest is moved along a horizontal straight line by a machine delivering a constant power. The distance moved by the body in time $t^{\prime}$ is proportional to :
A mass $m$ slips along the wall of a semispherical surface of radius $R$. The velocity at the bottom of the surface is