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Force in science

What is Weight?

Weight is a force caused by gravity. Because it is a force, it is also measured in Newtons (N). It is the gravitational force between the object and the Earth. An object will have greater weight if it has more mass.

All over the world, people read the weight of objects with kilograms. Thats is not correct. It is done only because it is easy for people to grasp. The proper scientific unit of measurement is Newton, and it is written as N

As mentioned in the previous page, the weight of an object is the same everywhere on earth because the object is under the same pull of gravity. In Space, there is no gravity so the object will not even sit on the scale at all. Is will just stay in suspense. Technically speaking, there is no weight on the Space.

Gravity on the Moon is less and that means an object will weigh less on Moon than on earth.

An object's weight (W) can be determined by the product of its' mass (m) and the magnitude of the local gravitational acceleration (g), thus W = mg.

An object with a mass of 1 kg has a weight of about 10 N, everywhere on earth.

Apparent weight
Sometimes the scale can record the weight of an object and get it wrong. Here is a simple test: The next time you stand on a scale, you will notice that your weight will be slightly more if you try to jump on it. This is because you put more force downwards, in addition to original force of of gravity. This is apparent weight and it is a measure of downwards force, not the weight from gravity.


What is a force