Physics · 2020
JEE Main · 9 January 2020, Shift 1 · Q5
A body A of mass m is moving in a circular orbit of radius R about a planet. Another body B of mass m/2 collides with A with a velocity which is half…
A body A of mass m is moving in a circular orbit of radius R about a planet. Another body B of mass $\displaystyle \frac{\mathrm{m}}{2}$ collides with A with a velocity which is half $\displaystyle \left(\frac{\vec{v}}{2}\right)$ the instantaneous velocity $\displaystyle \vec{v}$ of A . The collision is completely inelastic. Then, the combined body :
Official answer
(4)
starts moving in an elliptical orbit around the planet
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JEE Main 2020 Physics question, with the answer from NTA’s final answer key. Where our answers come from.