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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 the temperature of the sun were to increase from T to 2T and its radius from R and 2R
- Charge passing through a conductor of cross-section area A=0.3 m² is given
- The radius of the convex surface of a plano-convex lens is 20 cm and the refractive index
- A block of mass M is attached to the lower end of a vertical spring
- Changing magnetic fields can set up current loops in nearby metal bodies
Topics: Gravitation (63)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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