CAIE A-Level Physics 1.1.1 Numerical Magnitudes and Units

Practise reporting complete physical quantities with magnitude and unit, distinguishing them from bare numbers and preserving meaning when checking results.

Exam points

State a physical quantity with both its numerical magnitude and its unit when reporting an answer.
Distinguish a complete physical quantity from a bare number, a unit name or an isolated percentage in a calculation or data table.
Preserve the quantity’s meaning and units when interpreting or checking a numerical result; do not add direction, an SI base unit or scientific notation unless the question requires it.

[Maximum number: 2]

A property of a vector quantity, that is not a property of a scalar quantity, is direction. For example, velocity has direction but speed does not.

State two properties that are possessed by both scalar and vector physical quantities.
1.
2.

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1.1.1—All physical quantities consist of a numerical magnitude and a unit question 1