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The radius of a planet is twice the radius of earth. Both have almost equal average mass densities. If Vp and Ve are escape velocities of the planet and the earth, respectively, then,
Options
(a) Ve = 1.5 Vp
(b) Vp = 1.5 Ve
(c) Vp = 2 Ve
(d) Ve = 3 Vp
Correct Answer:
Vp = 2 Ve
Explanation:
Escape velocity, vₑ = R√(8/3 πGP)
⇒ vₑ ∞ R ⇒ Vₚ / Vₑ = Rₚ / Rₑ = 2
Vₚ = 2 vₑ
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Topics: Gravitation
(63)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- If M (A; Z), Mₚ and Mₙ denote the masses of the nucleus AZ X, proton
- A force of 10N is applied on a body for 3 sec and the corresponding displacement 6 m.
- The minimum velocity (in ms⁻¹) with which a car driver must traverse a flat curve
- A particle covers half of its total distance with speed v1 and the rest half distance
- The magnifying power of a telescope is 9. When it is adjusted for parallel rays
Topics: Gravitation (63)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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