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JEE Main 2026 (21 Jan, Shift 2) · Angular Momentum & its Conservation

Angular Momentum & its Conservation question from JEE Main 2026 (21 Jan, Shift 2)

Q5JEE Main 2026 · 21 JAN · SHIFT 2Medium

Angular Momentum & its Conservation

Two cars A and B each of mass $10^{3}$ kg are moving on parallel tracks separated by a distance of 10 m, in same direction with speeds 72 km/h and 36 km/h. The magnitude of angular momentum of car A with respect to car B is ________ J·s.

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Answer: (b)

Relative velocity of A w.r.t. B: $v_{rel}=20-10=10$ m/s (72 km/h = 20 m/s, 36 km/h = 10 m/s).
$L=m\,v_{rel}\,d=10^3\times10\times10$
$L=10^5$ J·s
So the answer is (b) $10^5$ .

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