Choose the incorrect statement from the following: (a) The linear speed of a planet revolving around the sun remains constant. (b) When a body falls towards earth, the displacement of earth towards the body is negligible. (c) The speed of satellite in a given circular orbit remains constant. (d) For a planet revolving around the sun in an elliptical orbit, the total energy of the planet remains constant.

Answer: (a). (a) In an elliptical orbit the speed is largest at perihelion and smallest at aphelion: incorrect. (b) Earth's huge mass gives it negligible acceleration: correct. (c) v = √(GM/r) is fixed for a given circular orbit: correct. (d) Gravity is conservative, so total energy is constant: correct. So the answer is (a).

Choose the incorrect statement from the following: | JEE Main 2023 (6 Apr, Shift 2)

Q8JEE Main 2023 · 6 APR · SHIFT 2Easy

Kepler's Laws & Planetary Motion

Choose the incorrect statement from the following:

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Answer: (a)

(a) In an elliptical orbit the speed is largest at perihelion and smallest at aphelion: incorrect.
(b) Earth's huge mass gives it negligible acceleration: correct.
(c) $v = \sqrt{GM/r}$ is fixed for a given circular orbit: correct.
(d) Gravity is conservative, so total energy is constant: correct.
So the answer is (a).

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Kepler's Laws & Planetary Motion question from JEE Main 2023 (6 Apr, Shift 2)

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