Embedded Files
Most of physics is built from just four things.
The 4 key building blocks of physics are:
Mass
Length
Time
Charge
Most of physics is built from just these four things.
These are the primary DIMENSIONS. Let's take a look at each...
Mass
Mass
All objects in everyday life have mass.
Mass has 2 key properties:
Inertia: Mass is difficult to move. Larger masses need more force to get them moving.
Gravity: Two masses will be pulled together. Normally the pull is very weak, but on Earth (which has a very large mass) we can feel gravity as an object’s ‘weight.’
The standard SI unit of mass is the kilogram (kg).
Length
Length
We all know how to measure a length (or distance).
Common units might be centimetres, inches, or miles, but the standard SI unit is the metre (m).
Typical symbols are s (distance), l (length), r or R (radius), d or D (diameter) etc.
In our everyday lives we experience a 3 dimensional (3D) world: left/right (x), forward/backward (y), and up/down (z).
We can measure length in each of these directions.
Time
Time
Anyone who can read a clock, knows about time.
Time can be measured in hours, minutes, and seconds, but the standard SI unit is the second (s).
Charge
Charge
Charge is a property of objects or particles.
Without charge there would be no electricity.
We feel charge when we get an electric shock, say static from a door handle.
Charge is present in every electrical device - the movement of charge is what powers your devices.
The standard SI unit of charge is the Coulomb (C).
Page updated
Google Sites
Report abuse