Motion

Scalars - Scalars are quantities that are fully described by a magnitude (or numerical value) alone.

Examples of Scalar Quantities - mass, length, temperature, energy, pressure, volume, electric charge, space-time interval, invariant mass

Vectors - Vectors are quantities that are fully described by both a magnitude and a direction.

Name and Symbols of Different Physical Terms, Descriptions and SI Units

Base quantity	Symbol	Description	SI unit
Length	l	The one dimensional extent of an object.	metre (m)
Matter	m	The amount of matter in an object.

Important Physics Discoveries in Chronology Order

• 1687 - Laws of motion and law of gravity: Newton
• 1782 - Conservation of matter: Lavoisier 
• 1785 - Inverse square law for electric charges confirmed: Coulomb 
• 1801 - Wave theory of light: Young