JEE Main 2018 — Center of Mass Momentum and Collision Question with Solution
JEE Main 2018 (15 Apr Shift 2 Online)
Question
A proton of mass collides elastically with a particle of unknown mass at rest. After the collision, the proton and the unknown particle are seen moving at an angle of with respect to each other. The mass of unknown particle is:
Choose an option
Show full solutionCorrect option: D
Correct answer
D
Step-by-step explanation
Apply principle of conservation of momentum along -direction,
Along -direction,
Coefficient of restution ( Collision is elastic) Solving eqs (i), (ii), \& (iii), we get mass of unknown particle,
Coefficient of restution ( Collision is elastic) Solving eqs (i), (ii), \& (iii), we get mass of unknown particle,
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This is a previous-year question from JEE Main 2018, covering the Center of Mass Momentum and Collision chapter of Physics. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.