Question

if accelaration of a free fall on moon is 1.6ms-2 and on earth is 10 ms-2. A rock has a mass of 10kg on earth it weight will be

Answer 1

This simply means that everything on the moon weighs a sixth of what it would weigh on the Earth. This is because the moon has a smaller mass, so it has a weaker gravitational field, so its gravitational force of attraction and thus acceleration is weaker.

In other words, close to the surface of the moon, everything falls with an acceleration approximately 1.6 ms^-2

So, if you want an easy way to lose weight, go to the moon!