The two things are known to us as mass and weight. These two things are useful to us in our everyday life. We thought that mass and weight are the same. We often say weight means mass. But this thought is really wrong. On earth, gravity is the same everywhere so that there is not pretty much difference between mass and weight.

One thing must be remembered that the measurement is not the same. As a result, we can’t use weight to mean mass. Weight is measured in Newton (N) and mass is measured in **kilograms (kg)**.

## What is the definition of weight?

**The definition of weight **is a measure of how happy gravity is pulled. So the weight is fully depending on gravity. Weight is changeable. If we consider a small particle which weight is 2 N on the earth but in the orbit, this particle’s weight is 0 N because of gravity. Since in the orbit, the gravitational force is zero that’s because the weight is zero.

In science, the weight is directly related to the amount of force which acts in an object due to the gravity. Gravitational force is not the same everywhere so that the weight of an object is not the same everywhere. Some information about weight are given below:

Weight is denoted by W

Unit (SI) is: kgms^−2 or Newton (N)

Derivation of weight: Weight=Mass*Acceleration (W=mg)

Dimension of weight: [MLT−2]

## What is the definition of mass?

**The definition of mass **is a measure of how much element something comprises. Mass is not changeable. Mass is the same everywhere. If we consider an object which mass is 2kg on the earth. In the orbital, this object’s mass is the same as before (2kg).

In other words, mass is a property which resists the accelerate. The gravitational attraction is also determined by the mass of an object. Some important information about mass are given below:

Mass is denoted by m

Unit (SI): kilogram (kg)

Derivation of mass: F= ma

→m=F/a (Mass = Applied force / Acceleration)

The dimension of mass: [M]

## What is the relationship between weight & mass?

A relationship is build up by the equation. An equation can solve out the unknown value by the help of known value. A formula or relationship is also present between weight and mass. So we can say that weight and mass are related to each other.

## Mass and weight formula

Applied force = Mass * Acceleration

→ F = m * a

Where force act as a weight of an object and acceleration act due to the gravity.

Therefore, Weight = Mass * Acceleration

→W = m*g (where, g = acceleration due to the gravity = 9.8 ms−2)

→ W = m * 9.8 (where the unit of weight is kgms−2 or N and unit of mass is kg and unit of acceleration is ms−2)

→ Weight = Mass * 9.8

This is the relationship between weight and mass.

## Similarities between mass and weight

- Weight is a measure of how nappy gravity is pulled and mass is a measure of how much element something comprises. So there is a similarity between mass and weight in the measurement issue.
- If an object mass is heavy it has more inertia and larger the weight it has more inertia too. So, Mass and weight are similar on the basis of inertia.
- If gravity is constant, weight and mass are the same.

W = mg

→ W = m * 1

→W = m

## Difference between mass and weight

- Weight is depending on gravity but Mass isn’t depending on gravity.
- Weight may vary from place to place but Mass is constant.
- Weight produce the motion but mass resist the motion or acceleration.
- Weight is measured by spring balance but Mass is measured by a physical balance.
- The unit of weight is N but the unit of mass in kg
- Weight is a vector quantity but Mass is a scalar quantity.
- Weight is one kind of force but the mass is not a force.
- Weight can be zero but mass can never.

We often confuse that mass and weight are the same or different. Sometimes we use mass to the mean of weight. But it’s wrong. Mass and weight are totally two different things. Mass is constant but the weight is changeable due to the gravitational force. If gravity is constant mass and weight will be the same.

You can check also

**Difference between Data and Information**

* Difference between Mass And Volume *and more

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