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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: - Vessel A is filled with hydrogen while vessel B, whose volume is
- The innermost orbit of hydrogen atom has a diameter 1.06Å. The diameter of tenth
- In an ammeter, 0.2% of main current passes through the galvanometer
- A milli ammeter of range 10 mA has a coil of resistance 1 ohm
- Which pair is isotonic?
Topics: Gravitation
(63)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Vessel A is filled with hydrogen while vessel B, whose volume is
- The innermost orbit of hydrogen atom has a diameter 1.06Å. The diameter of tenth
- In an ammeter, 0.2% of main current passes through the galvanometer
- A milli ammeter of range 10 mA has a coil of resistance 1 ohm
- Which pair is isotonic?
Topics: Gravitation (63)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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