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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
- Alternating current is transmitted to distant places at
- The angular speed of earth, so that the object on equator may appear weightless
- Masses of three wires of copper are in the ratio of 1:3:5 and their lengths
- In an ac circuit an alternating voltage e = 200 √2 sin 100 t volts is connected
- An electric dipole of moment ‘p’ is placed in an elecatric field of intensity ‘E’
Topics: Gravitation (63)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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