Physics · 2021
JEE Main · 27 August 2021, Shift 1 · Q3
A huge circular arc of length 4.4 ly subtends an angle '4s' at the centre of the circle. How long it would take for a body to complete 4 revolution…
A huge circular arc of length $\displaystyle 4.4$ ly subtends an angle '4s' at the centre of the circle. How long it would take for a body to complete $\displaystyle 4$ revolution if its speed is $\displaystyle 8$ AU per second ?
Given : $\displaystyle 1 \mathrm{ly}=9.46 \times 10^{15} \mathrm{~m}$
$$1 \mathrm{AU}=1.5 \times 10^{11} \mathrm{~m}
$$
Official answer
(1)
$\displaystyle 4.5 \times 10^{10} \mathrm{~s}$
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JEE Main 2021 Physics question, with the answer from NTA’s final answer key. Where our answers come from.