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The kinetic energy needed to project a body of mass m from the surface of earth (radius R) to infinity is
Options
(a) mgR/2
(b) 2mgR
(c) mgR
(d) mgR/4
Correct Answer:
mgR
Explanation:
The kinetic energy =1/2MVe²
The escape velocity Ve=√2gR
Ve²=2gR
= 2mgR/2
=mgR
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Topics: Gravitation
(63)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- When germanium is doped with phosphorus what type of semiconductor is produced?
- If a small sphere is let fall vertically in a large quantity of still liquid of density
- A beam of light contains two wavelengths 6500Å and 5200Å.
- A person has a minimum distance of distinct vision as 50 cm. The power of lenses
- A coil of N turns and mean cross-sectional area A is rotating with uniform angular
Topics: Gravitation (63)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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