# Find the mass by dividing by gravity?

1. Nov 22, 2003

### Alethia

I'm a bit curious and confused. In genereal problems, when they say that something weighs #Newtons, can you just find the mass by dividing by gravity?

2. Nov 22, 2003

### krab

Re: Weight

You have to say what you mean by "gravity". If you mean the acceleration of gravity, then the answer is yes: Mass equals weight divided by acceleration of gravity.

3. Nov 22, 2003

### Integral

Staff Emeritus
Yes, divide the weight in Newtons by g, $$9.8 \frac{m}{s^2}$$ to get the mass in kg. This of course assumes that you are on the surface of the earth.

Last edited: Nov 22, 2003
4. Nov 22, 2003

### Staff: Mentor

...and in a place where G = 9.8. It varies by more than most people realize (more than I realized until someone brought it up a month ago here).