| ⇦ | 
| ⇨ |
If the density of earth is doubled keeping its radius constant then acceleration due to gravity will be (g=9.8 m/s²)
Options
(a) 19.6 m/s²
(b) 9.8 m/s²
(c) 4.9 m/s²
(d) 2.45 m/s²
Correct Answer:
19.6 m/s²
Explanation:
Acceleration due to gravity g=GM/R² ——-(1)
The radius is constant, volume also constant.
If volume is constant, density is proportional to mass.(v=m/ρ)
The density is doubled, the mass is also doubled. (M’=2M)
The new acceleration due to gravity g’=GM’/R’²
Put the value M’=2M and R’=R
g’=G(2M)/R²
g’=2GM/R² ——–(2)
Substituting equations (1) and (2), we get
g’=2g
g=9.8 m/s²
g’=2×9.8=19.6 m/s²
Related Questions: - A rod of weight W is supported by two parallel knife edge A and B
- Two simple harmonic motions of angular frequency 100 and 1000 rad s⁻¹ have the same
- If a small sphere is let fall vertically in a large quantity of still liquid of density
- In Young’s double slit experiment, the slit seperation is 1 mm and the screen
- The distance travelled by a particle starting from rest and moving
Topics: Gravitation
(63)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A rod of weight W is supported by two parallel knife edge A and B
- Two simple harmonic motions of angular frequency 100 and 1000 rad s⁻¹ have the same
- If a small sphere is let fall vertically in a large quantity of still liquid of density
- In Young’s double slit experiment, the slit seperation is 1 mm and the screen
- The distance travelled by a particle starting from rest and moving
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