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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: - A current of 5 A is passing through a metallic wire of cross-sectional area 4×10⁻⁶ m².
- The unit of surface tension is
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Topics: Gravitation
(63)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A current of 5 A is passing through a metallic wire of cross-sectional area 4×10⁻⁶ m².
- The unit of surface tension is
- If fundamental frequency of closed pipe is 50 Hz then frequency of 2nd overtone
- A metal bar of length L and area of cross-section A is clamped between two rigid
- When two identical capacitors are in series, they have 3 μF capacitance
Topics: Gravitation (63)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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