Manipal MET2010PhysicsGravitation
At what height h above earth, the value of g becomes g / 2 ? (R= Radius of earth)
Options
- A3 R
- B2 R
- C( 2 -1) R
- D1 2 R
Correct answer
C. ( 2 -1) R
Step-by-step solution
The value of acceleration due to gravity at height h (when h is not negligible as compared to R ) g^ =g R^2 (R+h)^2 Here, g^ = g 2 g 2 =g R^2 (R+h)^2 or 1 2 = R^2 (R+h)^2 or 1 2 = R R+h or R+h= 2 R h=( 2 -1) R