In Column-I, 4 situations are depicted and in column-II, 4 possible kinds of collision are listed. Match the situation with the type of collision. List - I List - II (A) 3 & 1.5 m/s right; both 1.8 m/s right after (P) Elastic (B) 2 m/s left & 1 m/s right; 1 m/s left & 2 m/s right after (Q) Perfectly Inelastic (C) 3 m/s right & 1 m/s left; 3.4 m/s left & 0.6 m/s right after (R) Partially elastic (S) Collision is not possible

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PhysicsCenter of MassMomentum conservationMedium3 minQB

PhysicsMediummatching list

In Column-I, 4 situations are depicted and in column-II, 4 possible kinds of collision are listed. Match the situation with the type of collision.

List - I	List - II
(A) 3 & 1.5 m/s right; both 1.8 m/s right after	(P) Elastic
(B) 2 m/s left & 1 m/s right; 1 m/s left & 2 m/s right after	(Q) Perfectly Inelastic
(C) 3 m/s right & 1 m/s left; 3.4 m/s left & 0.6 m/s right after	(R) Partially elastic
	(S) Collision is not possible

Answer:

Solution:

Case A: common final velocity with momentum conserved ( $18 = 18$ ): perfectly inelastic, so A $\to$ Q.

Case B: momentum before $= - 4 + 8 = 4$ , after $= - 2 + 16 = 14$ : not conserved, so the collision is impossible, B $\to$ S.

Case C: momentum $6 - 8 = - 2 = - 6.8 + 4.8$ and KE $13 = 11.56 + 1.44$ both conserved: elastic, so C $\to$ P.

Answer: A $\to$ Q; B $\to$ S; C $\to$ P

Stream:JEESubject:PhysicsTopic:Center of MassSubtopic:Momentum conservation

⏱ 3mℹ️ Source: QB

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