First slide

Coefficient of restitution

Question

Directions (Q. Nos. 1-6) These questions consist of two statements each printed as Assertion and Reason. While
answering these questions, you are required to choose any one of the following four responses
Assertion : The relative velocity of the two particles in head on elastic collision is unchanged both in magnitude and direction.
Reason : The relative velocity is unchanged in magnitude but gets reversed in direction.

Moderate

A

If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.
B

If both Assertion and Reason are correct but Reason is not the correct explanation of Assertion.
C

If Assertion is correct but Reason is incorrect.
D

If Assertion is incorrect but Reason is correct.

Solution

$e = \frac{∣ RVOS, i.e. relative velocity of separation ∣}{∣ RVOA, i.e. relative velocity of approach ∣}$
In elastic collision, e = 1
$∴ |RVOS| = |RVOA|$

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