A planet moves around the sun. At a given point $P$, it is closest from the sun at a distance ${d_1}$ and has a speed ${v_1}$. At another point $ Q$, when it is farthest from the sun at a distance ${d_2}$, its speed will be
A planet moves around the sun. At a given point $P$, it is closest from the sun at a distance ${d_1}$ and has a speed ${v_1}$. At another point $ Q$, when it is farthest from the sun at a distance ${d_2}$, its speed will be
$\frac{{d_1^2{v_1}}}{{d_2^2}}$
$\frac{{{d_2}{v_1}}}{{{d_1}}}$
$\frac{{{d_1}{v_1}}}{{{d_2}}}$
$\frac{{d_2^2{v_1}}}{{d_1^2}}$
A planet moves around the sun. At a given point $P$, it is closest from the sun at a distance ${d_1}$ and has a speed ${v_1}$. At another point $ Q$, when it is farthest from the sun at a distance ${d_2}$, its speed will be
Angular momentum remains constant
$m{v_1}{d_1} = m{v_2}{d_2}\, \Rightarrow \,{v_2} = \frac{{{v_1}{d_1}}}{{{d_2}}}$
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