$Assertion$ : If collision occurs between two elastic bodies their kinetic energy decreases during the time of collision.
$Reason$ : During collision intermolecular space decreases and hence elastic potential energy increases.
If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.
If the Assertion is correct but Reason is incorrect.
If both the Assertion and Reason are incorrect.
A stream of glass beads, each with a mass of $15\ gram$, comes out of a horizontal tube at a rate of $100\ per second$. The beads fall a distance of $5\ m$ to a balance pan and bounce back to their original height. How much mass(in $kg$) must be placed in the other pan of the balance to keep the pointer at zero?
Two particles $A$ and $B$, move with constant velocities ${\vec v_1}$ and ${\vec v_2}$. At the initial moment their position vectors are ${\vec r_1}$ and ${\vec r_2}$ respectively. The condition for their collision is
A ball falls from a height of $5\,m$ and strikes the roof of a lift. If at the time of collision, lift is moving in the upward direction with a velocity of $1\,m/s$, then the velocity with which the ball rebounds after collision will be $-(e = 1)$
Three particles $A, B$ & $C$ of equal mass move with speed $V$ as shown to strike at centroid of equilateral triangle after collision. $A$ comes to rest & $B$ retraces its path with speed $V$. speed of $C$ after collision is :-
What percentage of kinetic energy of a moving particle is transferred to a stationary particle when it strikes the stationary particle of $5$ times its mass? (Assume the collision to be head-on elastic collision)