# Mathematical requirements

• In physics, maths is used as a tool to solve problems related to the relationships between quantities.
• Without basic maths skills you could still understand some concepts but would not be able to solve problems.
• Sometimes the language of maths is used to explain and describe not just perform calculations.
• Qualitative descriptions of data include the direction and relationship in which two variables change (e.g. as time increases, distance increases proportionally).
• Quantitative descriptions of data include numerical values (e.g. the speed of the object is 5ms-1).
• Graphs are visual representations used to represent relationships.

• ### Simultaneous equations

Particularly useful when solving circuit problems using Kirchoff´s laws, how to solve for two unknowns when you have two equations.

• ### Non-linear graphs

Some common non linear graphs.

How the radian is defined and why the angle is the same as the sin of the angle for small angles

• ### Linear graphs

Interpreting the gradient and intercept of straight line graphs

• ### Rearranging equations

Demonstrations of some simple algebra involving rearranging equations.

• ### Numbers

In physics, data collected from experiments and answers to problems are rarely nice easy whole numbers. This page shows some of the considerations you should have when presenting a number. When writing down a value from an experiment, we should...