Question
Physics Question on Gravitation
The kinetic energies of a planet in an elliptical orbit about the Sun, at positions A, B and C are KA, KB and KC, respectively. AC is the major axis and SB is perpendicular to AC at the position of the Sun S as shown in the figure. Then
A
KB > KA > KC
B
KA < KB < KC
C
KB < KA < KC
D
KA > KB > KC
Answer
KA > KB > KC
Explanation
Solution
As per, Kepler's Law - dtdA = constant
As dA/dt is constant, point A is perihelion and C is aphelion.
So, KA > KB > KC
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