| ⇦ | 
| ⇨ |
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: - Time period of the rotation of the earth about its own axis is 24 hour
- The force F acting on a particle of mass m is indicated by the force-time graph
- The half life of a radioactive isotope ‘X’ is 20 years. It decays to another element Y
- An inclined plane of length 5.60m making an angle of 45⁰ with the horizontal is placed
- When a p-n junction is reverse biased, then the current through the junction
Topics: Gravitation
(63)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Time period of the rotation of the earth about its own axis is 24 hour
- The force F acting on a particle of mass m is indicated by the force-time graph
- The half life of a radioactive isotope ‘X’ is 20 years. It decays to another element Y
- An inclined plane of length 5.60m making an angle of 45⁰ with the horizontal is placed
- When a p-n junction is reverse biased, then the current through the junction
Topics: Gravitation (63)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
18000+ students are using NEETLab to improve their score. What about you?
Solve Previous Year MCQs, Mock Tests, Topicwise Practice Tests, Identify Weak Topics, Formula Flash cards and much more is available in NEETLab Android App to improve your NEET score.
Share this page with your friends
Leave a Reply