Two balls of equal mass undergo head on collision while each was moving with speed $6 \,m / s$. If the coefficient of restitution is $\frac{1}{3}$, the speed of each ball after impact will be ............ $m / s$

A heavy steel ball of mass greater than $1\, kg$ moving with a speed of 2$m\,{\sec ^{ - 1}}$collides head on with a stationary ping-pong ball of mass less than $0.1\, gm$. The collision is elastic. After the collision the ping-pong ball moves approximately with speed ......... $m\,{\sec ^{ - 1}}$

A ball hits the floor and rebounds after inelastic collision. In this case

Three particles each of mass $m$ are located at the vertices of an equilateral triangle $ABC$. They start moving with equal speeds $v$ each along the medians of the triangle and collide at its centroid $G$. If after collision, $A$ comes to rest and $B$ retraces its path along $GB,$ then $C$

A ball falls vertically onto a floor with momentum $p$ and then bounces repeatedly. If the coefficient of restitution is $e$  then the total momentum imparted by the ball on the floor is

A body dropped from a height $1\,m$ on a floor rises to a height $25\,cm$ after first  rebound. The coefficient of restitution is :-