Question

what is a measurement? A body has mass 5kg, what does it mean? why is the unit of velocity called derived unit?

Answer 1

Answer:

Explanation:

Measurement

• To measure something is to give a value or quantity to the property of an object.
• Measuring means putting the amount of an object or thing into numbers. Measurement can be written using several different units.
• There are 7 fundamental quantities with their units :-  

1. For mass - kilogram (kg)
2. For length - meter (m)
3. For time - second (s)
4. For the amount of substance - mole (mole)
5. For electric current - ampere (A)
6. For temperature - kelvin (K)
7. For luminous intensity - candela (cd)

A body has mass 5 kg, what does it mean?

This means that:

• the amount of body is 5 kilograms.
• 5kg of matter is in that particular body

Why is the unit of velocity called derived unit?

• Velocity is the derived unit because it is not a fundamental unit.
• It is derived from the fundamental units.