Most of the people think that mass and weight are the same things.
The people who think that mass and weight are the same things are wrong. There
is a big difference between mass and weight. The difference between mass and
weight is given below;

## 1) Difference in the definitions of mass and weight

Mass and weight |

#### Mass

As we know that each body in the universe is made up of matter. In
this way, the quantity of that matter in a specific body is called the mass of
that body.

#### Weight

On the other hand, it is also a reality that Earth attracts
everything towards its centre with a force. That force is called the
Gravitational Force. In this way, weight is the measurement of such force by
which the Earth attracts a body towards its centre.

## 2) Difference in the type of quantities

As we know that there are two types of quantities. One is the
scalar quantity and the second is the vector quantity.

#### Mass

The mass of a body is a scalar quantity.
A scalar quantity is such a quantity which is described only with the help of
magnitude and there is no need of direction for its description. For example,
5kg sugar is a scalar quantity.

#### Weight

On
the other hand, weight is a vector quantity. A vector quantity is such a
quantity which is described by the magnitude as well as direction. The
direction of the weight is always directed towards the centre of the Earth. The
simplest example of the vector quantity is the Force.

## 3) Difference in the nature of mass and weight

#### Mass

The nature of mass is that it remains
constant everywhere.

#### Weight

On the other hand, the nature of weight
is different from the mass. Its reason is that weight of a body doesn’t remain
constant. It varies from one point to another point.

## 4)

#### Mass

The mass of a body can’t be zero.

#### Weight

On the other hand, the weight of a body
can be zero. Its reason is that it depends upon the gravity and gravity can be
zero and in this regard, the weight of a body can also be zero.

## 5) Difference in the formulas of mass and weight

#### Mass

We use two different formulas to determine the mass and weight of
a body. When we are going to measure the mass of a body, then we use the
following formula;

F=ma
or
m=F/a This formula is derived with the help of Newton’s second
law of motion.

#### Weight

On the other hand, when we are going to measure the weight of a
body, then we use the following formula;

W = mg

## 6) Difference in the measuring instruments of the mass and weight

#### Mass

If
we want to measure the mass and weight of a body, then it is also necessary for
us to use the two different measuring instruments. If we want to measure the
mass of a body, then we use the ordinary balance.

Ordinary balance |

#### Weight

On
the other hand, if we want to measure the weight of a body, then we use the
spring balance.

Spring balance |

## 7) Difference in the SI units of the mass and weight

#### Mass

We
use the two different SI units for the mass as well as for the weight. The SI
unit of the mass is kg.

#### Weight

On
the other hand, the SI unit for the weight is N.

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