Basic Mechanics — CSIR Net PYQ (Question 2)

A Basic Mechanics previous-year question (PYQ) from Classical Mechanics (CSIR Net). Read the question, check the correct answer, then practise the full topic.

Question 2 of 19 · 5.0 marks

After a perfectly elastic collision of two identical balls, one of which was initially at rest, the velocities of both the balls are nonzero. The angle

θ

between the final velocities (in the lab frame) is

1 $θ = \frac{π}{2}$
2 $θ = π$
3 $0 < θ \leq \frac{π}{2}$
4 $\frac{π}{2} < θ \leq π$

Correct answer: Option 1

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This Basic Mechanics PYQ is part of the Classical Mechanics section of CSIR Net. Browse more Basic Mechanics questions or join the PhysicsByAaryan live batch for full conceptual coverage.