Which of the following are correct?

Options

A. Out of electrostatic, electromagnetic, nuclear and gravitational interactions, the gravitational interaction is the weakest.
B. If the earth were to 'rotate faster than its present speed, the weight of an object would decrease at the equator but remain unchanged at the poles.
C. The mass of the earth in terms of `g, R` and `G` is `(gR^(2)//G)`.
D. If the earth stops rotating in its orbit around the Sun there will be no variation in the weight of a body on the surface of earth.

Answer

A, B, C, D

Explanation

a. Factual statement
b. `g=(GM)/(R^(2))` or `M=(gR^(2))/G`
d. The weight of a body on the surface of earth is not determined by the orbital motion of earth around Sun.