Physics · 2018
JEE Main · 15 April 2018, Shift 2 · Q4
A proton of mass m collides elastically with a particle of unknown mass at rest. After the collision, the proton and the unknown particle are seen…
A proton of mass m collides elastically with a particle of unknown mass at rest. After the collision, the proton and the unknown particle are seen moving at an angle of $\displaystyle 90$° with respect to each other. The mass of unknown particle is :
Official answer
(2)
m
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JEE Main 2018 Physics question, with the answer from NTA’s final answer key. Where our answers come from.