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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
Related Questions: - The effective length of magnet is 31.4 cm and its pole strength is 0.8Am.
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Topics: Gravitation
(63)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The effective length of magnet is 31.4 cm and its pole strength is 0.8Am.
- If capillary experiment is performed in vaccum, then a liquid under the condition
- The angle of incidence for a ray of light at a refracting surface of a prism is 45⁰.
- In thermodynamics processes which of the following statements is not true?
- Light propagates rectilinearly because of its
Topics: Gravitation (63)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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