Question

What happens to the force b between two objects if (i) the mass of one object is doubled (ii) distance between the object is doubled (iii) the masses of objects are doubled

Answer 1

From Universal law of , force exerted on an object of mass m by earth is given by 

 

So as the mass of any one of the object is doubled the force is also doubled
(ii) The force F is inversely proportional to the distance between the objects. So if the distance between two objects is doubled then the gravitational force of attraction between them is reduced to one fourth of its original value. Similarly f the distance between two objects is tripled , then the gravitational force of attraction becomes one ninth of its original value.

(iii) Again fron Universal law of attraction from equation 1 force F is directly proportional to the product of both the masses. So if both the masses are doubled then the gravitational force of attraction becomes four times the original value.