Physics · 2019
JEE Main · 12 April 2019, Shift 1 · Q3
A man (mass =50 kg ) and his son (mass =20 kg ) are standing on a frictionless surface facing each other. The man pushes his son so that he starts…
A man (mass $\displaystyle =50 \mathrm{~kg}$ ) and his son (mass $\displaystyle =20 \mathrm{~kg}$ ) are standing on a frictionless surface facing each other. The man pushes his son so that he starts moving at a speed of $\displaystyle 0.70 \mathrm{~ms}^{-1}$ with respect to the man. The speed of the man with respect to the surface is :
Official answer
(1)
$\displaystyle 0.20 \mathrm{~ms}^{-1}$
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JEE Main 2019 Physics question, with the answer from NTA’s final answer key. Where our answers come from.