Distinguish between the mass and weight of a body, stating the SI units for each?

Mass is a measure of the amount of matter in an object, while weight is a measure of the force of gravity acting on an object. The SI unit for mass is the kilogram (kg), while the SI unit for weight is the newton (N).

Mass

Mass is a measure of the amount of matter in a body. It is an intrinsic property of the body and does not change with its location or the presence of gravitational or other forces. The SI unit of mass is the kilogram (kg).

Weight

Weight is a measure of the gravitational force acting on a body. It is a vector quantity and has both magnitude (the force in newtons) and direction (downward). The weight of a body is proportional to its mass and the acceleration due to gravity at the location where it is measured. The SI unit of weight is the newton (N).

The relationship between mass and weight is given by the equation:

```
Weight = Mass × Acceleration due to gravity
```

or

```
W = mg
```

where:

- W is the weight of the body in newtons
- m is the mass of the body in kilograms
- g is the acceleration due to gravity at the location where the weight is measured (approximately 9.81 m/s²)