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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: - Which of the following particles will have minimum frequency of revolution
- Curie temperature above which
- Young’s modulus of the material of a wire is 18×10¹¹ dyne cm⁻².its value in SI is
- The angle between the two vectors A = 3i+4j+5k and B = 3i+4j-5k will be
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Topics: Gravitation
(63)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Which of the following particles will have minimum frequency of revolution
- Curie temperature above which
- Young’s modulus of the material of a wire is 18×10¹¹ dyne cm⁻².its value in SI is
- The angle between the two vectors A = 3i+4j+5k and B = 3i+4j-5k will be
- A wire having resistance 12Ω is bent in the form of an equilateral triangle.
Topics: Gravitation (63)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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