Integrated physical reasoning is the skill of using more than one physics idea, plus the data you are given, to reach one clear conclusion. In Co-ordinated Sciences 0654, physics sits beside biology and chemistry in one double-award route, so physics questions are often short chains rather than isolated formulas.
Check the current Cambridge syllabus page for the exact content and tier details for your exam year, since those can change between years. This module teaches the reasoning habits that work across whichever topic list applies to you.
What should I already know?
You will get more from this module if these are familiar:
- Units for mass (kg), length (m), time (s), energy (J), power (W), current (A), potential difference (V) and resistance (Ω).
- Rearranging a simple formula such as v = f × λ or V = I × R.
- Reading values from a table and quoting answers to a sensible number of significant figures.
- The idea of particles in solids, liquids and gases.
What does one integrated question look like?
Here is a short orienting example using invented data. A 0.20 kg ball is dropped from a height of 1.25 m.
Use g = 10 N/kg and ignore air resistance. How fast is it moving just before it lands?
Stage 1. Gravitational potential energy lost = mgh = 0.20 × 10 × 1.25 = 2.5 J.
Stage 2. All of it becomes kinetic energy, so ½ × 0.20 × v² = 2.5. That gives 0.10 v² = 2.5, so v² = 25 and v = 5.0 m/s.
Check. v² = 2gh = 2 × 10 × 1.25 = 25, so v = 5.0 m/s. The two routes agree.
Notice the pattern: name the stage, name the energy store, carry the number across, then check with a second method. The same pattern drives circuits, waves and decay questions.
In what order should I study the lessons?
- Combine energy and motion in a staged problem: the clearest model of carrying one quantity from stage to stage.
- Interpret a wave observation and a numerical relationship: practises turning words into frequency, wavelength and speed.
- Connect thermal transfer with particle behaviour: the particle model that links physics to chemistry.
- Explain a circuit change using more than one quantity: the longest reasoning chain, so it benefits from the earlier habits.
- Relate a nuclear or space model to supplied evidence: tests models against data, the skill that closes the module.
What are the common traps?
- Mixing units, such as grams with kilograms or centimetres with metres, before substituting.
- Dropping a factor, usually the ½ in kinetic energy.
- Changing the wrong quantity, for example saying frequency changes when a wave enters a new medium.
- Naming a process without the particles, which loses explanation marks.
- Forgetting a correction, such as background count, before using a model.
Writing a one-line unit check beside each substitution removes most of these.
How do I use the practice set?
Work through the integrated practice set after the lessons, without notes, and log each wrong answer in the mistake log and retest queue. The scientific investigation critic is the companion tool when a question asks you to judge an experiment.
When a pattern of mistakes keeps returning, our teachers can look at the reasoning behind it in online one-to-one Co-ordinated Sciences tuition.