JEE Main 2019 — Center of Mass Momentum and Collision Question with Solution
JEE Main 2019 (11 Jan Shift 1)
Question
A body of mass falls freely from a height of , on a platform of mass which is mounted on a spring having spring constant . The bodysticks to the platform and the spring's maximum compression is found to be . Given that the value of will be close to :
Choose an option
Show full solutionCorrect option: B
Correct answer
B
Step-by-step explanation
Velocity of block just before it collides with
block
Using principle of conservation of linear momentum just before and just after collision, we get
Initial compression of spring
using work energy theorem,
solving
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This is a previous-year question from JEE Main 2019, 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.