K326 / K327 / 2027

Chapter 3

Force and pressure

Use measured quantities to explain an object and its interactions.

Learn to calculate weight, determine mass per unit volume and compare the effect of force spread over an area.

Includes contact and non-contact forces, gravitational field strength, density and surface pressure. For K326 / K327 (2027) / 5086 / 5087 (2026).

Start readingRevision summaryRead whole chapter

Choose a topic

  1. Forces, mass and weight

    Identify force types, distinguish mass from weight and calculate weight in a given gravitational field.

  2. Density from measurements

    Measure mass and volume, calculate density and use consistent units.

  3. Pressure at a surface

    Relate pressure to perpendicular force and contact area, and convert areas correctly.