Physics · 2021
JEE Main · 31 August 2021, Shift 2 · Q8
A block moving horizontally on a smooth surface with a speed of 40 m/s splits into two parts with masses in the ratio of 1: 2. If the smaller part…
A block moving horizontally on a smooth surface with a speed of $\displaystyle 40$ m/s splits into two parts with masses in the ratio of $\displaystyle 1$ : 2. If the smaller part moves at $\displaystyle 60$ m/s in the same direction, then the fractional change in kinetic energy is :
Official answer
(1)
$\displaystyle \frac{1}{8}$
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JEE Main 2021 Physics question, with the answer from NTA’s final answer key. Where our answers come from.