Question

Difference between universal Gravitational constant and Gravitation acceleration of earth

Answer 1

UNIVERSAL GRAVITATIONAL CONSTANT

• Every object in the earth attract each other with a force which directly Proportional to their masses and inversely proportional to their distance. It is called Universal Gravitational Constant.

• This Force is Constant everywhere in the universe.

• Gravitational Constant can never be zero at any Point in the earth

• It is a Scalar quantity.

• The value of "G" is $\rm{6.67\times{10^{-11}}}$

• It's SI unit is $\rm{Nm^2kg^-2}$

ACCELERATION DUE TO GRAVITY.

• The force acting on a object which is falling freely in Downward direction is called Acceleration due to gravity.

• It is not same everywhere. Due to the Oval shape of earth, the value of "g" is maximum in Poles and minimum in Equator.

• The Value of "g" is Zero at the center of the earth.

• The value of "g" near the surface of earth is $\rm{9.8m/s^{-2}}$ It is taken 10m/s-² for convenience.

• It is a Vector quantity.

• The SI unit of "g" is m/s².