Physics · 2019
JEE Main · 9 April 2019, Shift 1 · Q4
A body of mass 2 kg makes an elastic collision with a second body at rest and continues to move in the original direction but with one fourth of its…
A body of mass $\displaystyle 2$ kg makes an elastic collision with a second body at rest and continues to move in the original direction but with one fourth of its original speed. What is the mass of the second body ?
Official answer
(2)
1.$\displaystyle 2$ kg
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JEE Main 2019 Physics question, with the answer from NTA’s final answer key. Where our answers come from.