Physics Equations and Units Reference Guide

This comprehensive guide details the essential equations and units required for the GCSE Physics formula sheet AQA specification. The page is structured into three main sections: recall equations, given equations, and standard symbols with units.

The recall section includes fundamental equations such as work done $W = Fs$, kinetic energy $Ek = ½mv²$, and gravitational potential energy $Ep = mgh$. Power calculations are represented through multiple equations including P = E/t and P = W/t.

Definition: Work done is defined as the product of force and distance along the line of action of the force $W = Fs$.

Example: When calculating kinetic energy, if a 2kg object moves at 3m/s, the energy would be: Ek = ½ × 2 × 3² = 9 joules.

Highlight: The efficiency equations demonstrate both energy and power relationships: Efficiency = useful output/total input.

Vocabulary: Standard SI prefixes range from nano (10⁻⁹) to giga (10⁹), with common prefixes like milli (10⁻³) and kilo (10³) in between.

Quote: "For gases: pressure × volume = constant" - this represents Boyle's Law, a fundamental gas law in physics.

The document concludes with a comprehensive list of standard symbols and their corresponding SI units, essential for accurate physics calculations and problem-solving.