| ⇦ | 
| ⇨ |
A particle of masses m is thrown upwards from the surface of the earth, with a velocity u. The mass and the radius of the earth are, respectively, M and R. G is gravitational constant and g is acceleration due to gravity on the surface of the earth. The minimum value of u so that the particle does not return back to earth, is
Options
(a) √( 2GM / R)
(b) √( 2GM / R)²
(c) √( 2G R²)
(d) √( 2GM / R)²
Correct Answer:
√( 2GM / R)
Explanation:
The velocity u should be equal to the escape velocity. That is, u = √(2gR)
But g = GM / R² ⇒ u = √(2 . GM / R² . R)
√( 2GM / R)
Related Questions: - Consider two nuclei of the same radioactive nuclide. One of the nuclei was created
- A radiotransmitter radiates 1 kW power at a wavelength 198.6 m. How many photons
- Surface tension of water will be minimum at
- A body of mass 10 kg is moving on an inclined plane of inclination 30°with an acceleration
- A particle is executing a simple harmonic motion. Its maximum acceleration
Topics: Gravitation
(63)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Consider two nuclei of the same radioactive nuclide. One of the nuclei was created
- A radiotransmitter radiates 1 kW power at a wavelength 198.6 m. How many photons
- Surface tension of water will be minimum at
- A body of mass 10 kg is moving on an inclined plane of inclination 30°with an acceleration
- A particle is executing a simple harmonic motion. Its maximum acceleration
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