What is the relationship between the universal
gravitational constant (G) and the acceleration due to
gravity (g)?

Answer Posted / gagandeep garg

F = G x M x m/ r2
E = F x r = (G x M x m/ r2) x r
E = mgr = (G x M x m/ r2) x r
=> g = G x M/ r2

OR G = g{r2/M}

where,
F = Force of attraction between twoo bodies(N/m2)
E = energy in smaller body w.r.t the heaviour body(J)
M = mass of heaviour body/planet (kg or slug)
m = mass of smaller body(kg or slug)
g = acceleration due to gravity (m/s2 or ft/s2)
G = universal gravitational constant (m3/kg/s2 or
ft3/slug/s2)
r = distance between the centres of the two bodies(m or ft)
The value of G is known and has been estimated by
scientists as:
G = 6.673 x 10-11 m3/kg/s2 in the Metric system
G = 3.439 x 10-8 ft3/slug/s2 in the English system

Is This Answer Correct ?    69 Yes 39 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

Hi Friends i am going to write BARC written test by this month 20th (20-5-2008). So please if any body knows the details about this or having previous question papers pls mail me to kkumarei@gmail.com. For Suggestions give one message to 9962122264

1951


how pressure transmitter work, what is its principal to measure and how its generate signal. for pressure transmitterinstallation which precautions must be taken ??

1289


what is surge and how is it prevented, what is the purpose of bypass valve across AS valve.

1536


What are different types of cable?

641


i have done DAE in Instrumentation and Process Control. i have applied for an apprentice training in chemical company after three day my interview will be conduct but i need more information about industrial process control and controller. my e mail is imran_dilsetu@yahoo.com please tell me interview question relative to instrumentation ?

1850






what are the steps I have to deal with?

1728


can you provide me full detail about instrumentation in ONGC??

1716


What is the advantage of using locally fabricated hook ups over Pre fabricated hook ups in process instrumentation?

1573


What is the diffrence between digital signal processing and discrete signal processing?

1553


If a warning lamp will operate with the ground circuit is bypassed with a jumper wire to ground, what should you check?

1596


I want to know the questions asked in ONGC interview(after being selected in the written exam) for Instrumentation branch.Kindly help.

1738


How RAL(Rotary air lock)works in cement industry?

1932


Can anyone send most commonly asked interview question in Oil & Gas industry

1737


what is the working principal of pribe

1780


What is the purpose of LO Overhead tank in turbines.

1547