Acceleration Due To Gravity


Gravitation - Concepts
Class - RRB Technician Grade I Signal Subjects
 
 
Concept Explanation
 

Acceleration Due To Gravity

In fact, the value of g increases with depth up to a certain distance and then decreases. This is because the earth is considered to be a uniform density ball which is not correct. The maximum load of he earth remains centered at the core.

No. Gravitational Acceleration Gravity Constant
1. The acceleration generated in the body due to the gravitational force exerted by the earth on a body is called gravity acceleration. It is displayed with the letter 'g'. Gravitational force acting between two of unit mass located at unit distance is called gravitation constant. It is displayed with the letter 'G'.
2. S.I. unit of g is meter second. S.I. unit of 'G' is Newton meter^2 kg^2 .
3. The value of 'g' varies at different places. The value of 'G' is the same in all places.
4. The value of 'g' on the earth surface is about 9.81 meter second^2. Value of 'G' is 6.67 X 10^-^11 Newton meter^2 kg^2
5. 'g' is a vector quantity. 'G' is a scalar quantity.
  • The upper surface are quite light, for a very small depth, the decrease in mass is assumed to be negligible while the value of r is decreased. Therefore the value of g first rises to some dept and starts decreasing again. This means that the assumption that the Earth is a sphere of equal density is not correct.
  • Change in Value of 'g'

  • The highest value of g is at the poles and the lowest is at the equator.
  • The value of g increases as the Earth's rotation speed decreases, the value of g decreases as the rotation speed increases.
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