Define gravity.  

What will happen to the gravitational force between two bodies if the masses of one body is doubled?  

Why is the universal gravitational constant?

Who formulated the universal law of gravitation?

How is gravitation different from gravity?  

What does a small value of G indicate?  

At what place on the earth surface is the weight of a body maximum?

At what place on the earth surface is the weight of a body minimum?

If the mass of a body is 9.8 kg on the earth, what would be its mass on the moon?

Do fluids possess weight?