The kinetic energies of a planet in an elliptical orbit about the Sun, at positions, $A, B$ and $C$ are ${K}_{A}, {K}_{B}and{K}_{C}$ , respectively. $AC$ is the major axis and $SB$ is perpendicular to $AC$ at the position of the Sun $S$ as shows in the figure. Then

Question

The kinetic energies of a planet in an elliptical orbit about the Sun, at positions,

A, B

and

C

are

{K}_{A}, {K}_{B}and{K}_{C}

, respectively.

AC

is the major axis and

SB

is perpendicular to

AC

at the position of the Sun

S

as shows in the figure. Then

The kinetic energies of a planet in an elliptical orbit about the Sun, at positions, A, B and C are K _ A , K _ B and K

Quantrex Academy · Accepted Answer

Correct answer: B. K _ A > K _ B > K _ C

By angular momentum consentration about the sun, L = Iω = constant KE = L ^ 2 2I ∵ SA ∠ SB ∠ SC ⇒ I _ A KE _ A > KE _ B > KE _ C

The kinetic energies of a planet in an elliptical orbit about the...