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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: - An explosion breaks a rock into three parts in a horizontal plane
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Topics: Gravitation
(63)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- An explosion breaks a rock into three parts in a horizontal plane
- In a diffraction pattern due to a singleslit of width a, the first minimum is observed
- A transistor-oscillator using a resonant circuit with an inductor L
- Two metallic spheres of radii 1 cm and 3 cm are given charges of -1 x 10⁻² C
- Two bodies of masses m₁ and m₂ and having velocities v₁ and v₂ respectively
Topics: Gravitation (63)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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