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Sahay Sir > Question Answers > MTG NEET Physics > Part 1 > Chapter 8 - COM, Momentum and Collision > Two small bodies of masses ‘m’ and ‘2m’ are placed in a fixed smooth horizontal circular hollow tube of mean radius’ as shown. The mass ‘m’ is moving with speed’ u and the mass 2m’ is stationary. After their first collision, the time elapsed for next collision is : coefficient of restitution e = 1/21.

Two small bodies of masses ‘m’ and ‘2m’ are placed in a fixed smooth horizontal circular hollow tube of mean radius’ as shown. The mass ‘m’ is moving with speed’ u and the mass 2m’ is stationary. After their first collision, the time elapsed for next collision is : coefficient of restitution e = 1/21.

A body of mass 1 kg strikes elastically with another body at rest and continues to move in the same direction with one fourth of its initial velocity. The mass of the other body is