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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: - If the distance between the plates of two capacitor is increased then capacitance
- The potential energy of a simple harmonic oscillator when the particle is half way
- The area of cross-section of a steel wire (Y=2.0×10¹¹ N/m²) is 0.1 cm².
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Topics: Gravitation
(63)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- If the distance between the plates of two capacitor is increased then capacitance
- The potential energy of a simple harmonic oscillator when the particle is half way
- The area of cross-section of a steel wire (Y=2.0×10¹¹ N/m²) is 0.1 cm².
- A missile is fired for maximum range with an initial velocity of 20 m/s
- A heavy stone hanging from a massless string of length 15 m is projected
Topics: Gravitation (63)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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