Fundamentholfundamenthol
JEE Main2019Physics
Q.

An alpha-particle of mass m suffers 1-dimensional elastic collision with a nucleus at rest of unknown mass. It is scattered directly backwards losing, 64% of its initial kinetic energy. The mass of the nucleus is: 

  1. A

    1.5 m

  2. B

    3.5 m

  3. C

    4 m

  4. D

    2 m

Solution

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