Physics · 2020
JEE Main · 8 January 2020, Shift 1 · Q4
Consider a uniform rod of mass M =4 m and length l pivoted about its centre. A mass m moving with velocity v making angle θ=(π)/4 to the rod's long…
Consider a uniform rod of mass $\displaystyle \mathrm{M}=4 \mathrm{~m}$ and length $\displaystyle l$ pivoted about its centre. A mass m moving with velocity $\displaystyle v$ making angle $\displaystyle \theta=\frac{\pi}{4}$ to the rod's long axis collides with one end of the rod and sticks to it. The angular speed of the rod-mass system just after the collision is :
Official answer
(3)
$\displaystyle \frac{3 \sqrt{2}}{7} \frac{v}{l}$
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JEE Main 2020 Physics question, with the answer from NTA’s final answer key. Where our answers come from.