Question

An object at a distance of 6400km from the centre

the earth weights 50 Newton
what will be its weight if
it is shifted to 12800 km from the center of the earth?​

Answer 1

12.5N

Step-by-step explanation:

From newton law of universal gravitation F= GmM/d2.

that means Force is inversely proportional to the square of the distance apart.

F1= 50N, d1=6400km

F2=?, d2=12800km

F1/F2=d2×d2/d1×d1 so we have 50/F2= 12800×12800/6400×6400...F2=6400×6400×50/(12800×12800)=12.5N