04 Forces

Download the pdf document.

Click on the URLs below for supporting resources for each section (or type them yourself e.g. xmphysics.com/4.1)


4.1 Hydrostatic Pressure
+++4.1.1 The formula
+++4.1.2 Pressure Acts in All Directions
+++4.1.3 Atmospheric Pressure
4.2 Upthrust
+++4.2.1 Archimedes’ Principle
+++4.2.2 Law of Floatation
+++4.2.3 Worked Examples
+++4.2.4 Demonstrations
4.3 Static Equilibrium
+++4.3.1 Translational Equilibrium
+++4.3.2 Moments
+++4.3.3 Rotational Equilibrium (pivot or hinge)
+++4.3.4 Rotational Equilibrium (centre of mass)
+++ Centre of Mass (Beyond the syllabus)
+++4.3.5 Couple
+++4.3.6 Static Equilibrium
+++4.3.7 Why Must Three Forces Intersect 
4.4 Free Body Diagram

For convenience, supporting resources are also listed by types:

Demonstrations: Click HERE

Video Explanations: Click HERE

Worked Examples: Click HERE

Supplementary Reading