Two small balls, a and b, attract each other gravitationally with a force of magnitude f. if we now double both masses and the separation of the balls, what will now be the magnitude of the attractive force on each one?
a) 16f
b) 8f
c) 4f
d) f
e)f/4

New force, F' = F

Explanation:

Given that, two small balls, A and B, attract each other gravitationally with a force of magnitude F. It is given by :

If we now double both masses and the separation of the balls, the new force is given by :

F' = F

So, the new force remains the same as previous one. Hence, the correct option is (d) "F"

found in the nucleus

has mass of one amu

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less than, more