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Physics · GRAVITATION
हिन्दीA planet orbits the Sun in an elliptical path. The distance of the planet at perihelion is \( r_P \) and at aphelion is \( r_A \). If the linear speed of the planet at perihelion is \( v_P \), what is its linear speed \( v_A \) at aphelion?
Correct answer · Option 2
\( v_A = v_P (\frac{r_P}{r_A}) \)
Explanation
By conservation of angular momentum about the Sun, \( L = m r_P v_P = m r_A v_A \), which yields \( v_A = v_P (\frac{r_P}{r_A}) \).
