Q.

Two astronauts are floating in gravitational free space after having lost contact with their spaceship. The two will    [2017]

1 move towards each other  
2 move away from each other  
3 will become stationary  
4 keep floating at the same distance between them.  

Ans.

(1)

Since two astronauts are floating in gravitational free space. The only force acting on the two astronauts is the gravitational pull of their masses, F=Gm1m2r2,

which is attractive in nature.

Hence they move towards each other.