cse • paper_1 • mechanics
[UPSC CSE 2025] Special Theory of Relativity (Q317, 10M)
A particle of rest mass 1\text{ kg} and velocity of magnitude 0\cdot 9c collides with a particle of mass 2\text{ kg} at rest. After collision the two particles coalesce and form a single particle of mass M and velocity V. Determine M and V.
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