Physics · 2019
JEE Main · 12 January 2019, Shift 2 · Q4
An alpha-particle of mass m suffers 1-dimensional elastic collision with a nucleus at rest of unknown mass. It is scattered directly backwards…
An alpha-particle of mass $\displaystyle m$ suffers $\displaystyle 1$-dimensional elastic collision with a nucleus at rest of unknown mass. It is scattered directly backwards losing, $\displaystyle 64$% of its initial kinetic energy. The mass of the nucleus is :
Official answer
(1)
$\displaystyle 4$ m
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JEE Main 2019 Physics question, with the answer from NTA’s final answer key. Where our answers come from.