| ⇦ | 
| ⇨ |
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: - In p- type semiconductor, the acceptor level lies
- A tuning fork vibrates with 2 beats in 0.04 second. The frequency of the fork is
- A force F=ai+3j+6k is acting at a point r=2i-6j-12k. The value of α for
- A wave travelling in the +ve x-direction having displacement along y-direction as 1m
- The p-type semiconductor is
Topics: Gravitation
(63)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- In p- type semiconductor, the acceptor level lies
- A tuning fork vibrates with 2 beats in 0.04 second. The frequency of the fork is
- A force F=ai+3j+6k is acting at a point r=2i-6j-12k. The value of α for
- A wave travelling in the +ve x-direction having displacement along y-direction as 1m
- The p-type semiconductor is
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