Assertion $(A)$: In an elastic collision between two bides, the relative speed of the bodies after collision is equal to the relative speed before the collision.
Reason $(R)$: In elastic collision, the linear momentum of the system is conserved.
If both Assertion and Reason are true and Reason is correct explanation of Assertion.
If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
If Assertion is true but Reason is false.
If both Assertion and Reason are false.
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 $1.0\, kg$ ball drops vertically into a floor from a height of $25\, cm$. If rebounds to a height of $4\ cm$. The coefficient of restitution for the collision is
A heavy body moving with a velocity of $6\,ms^{-1}$ collides elastically with a light body (whose mass is half of mass of heavy body) at rest. The velocity of light body will be (in $ms^{-1}$ )
In $a$ smooth stationary cart of length $d, a$ small block is projected along it's length with velocity $v$ towards front. Coefficient of restitution for each collision is $e$. The cart rests on $a$ smooth ground and can move freely. The time taken by block to come to rest $w.r.t$. cart is
A light particle moving horizontally with a speed of $12\ m/s$ strikes a very heavy block moving in the same direction at $10\ m/s$. The collision is one-dimensional and elastic. After the collision, the particle will