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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
- A motor-cyclist drives a motor cycle in a vertical circle. His minimum velocity
- Two charges each equal to 2µ C are 0.5m apart. If both of them exist inside vacuum
- In a transistor, the value of βis 100, then the value of α will be
- A thin wire of resistance 4 ohm is bent to form a circle. The resistance across
- The number of possible natural oscilations of air column in a pipe closed
Topics: Gravitation (63)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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