Motion — Equations and Graphs
Model one-dimensional motion using scalar and vector quantities, constant-acceleration equations, linked graphs and measured evidence.
How to study Higher Physics
Move between physical models, relationships, units, graphs and justified conclusions, while using current official materials for exact paper and assignment conditions.
Core concepts
Concept 1
distance and displacement; speed and velocity
Exam cue: Choose a relationship that contains the known quantities and target.
Concept 2
constant-acceleration relationships
Exam cue: Read gradient and signed area according to the graph axes.
Concept 3
displacement–time, velocity–time and acceleration–time graphs
Exam cue: Treat direction explicitly when velocity or displacement changes sign.
Concept 4
experimental measurement of acceleration
Risk pitfalls and guardrails
Using distance where a signed displacement is required.
Guardrail: Check assumptions, prefixes, units, significant figures and whether the statement is supported by evidence.
Treating area below the time axis as positive displacement.
Guardrail: Check assumptions, prefixes, units, significant figures and whether the statement is supported by evidence.
Applying constant-acceleration equations when acceleration varies.
Guardrail: Check assumptions, prefixes, units, significant figures and whether the statement is supported by evidence.
Memory anchors
Distance or displacement?
Distance is scalar path length; displacement is the vector change in position.
Gradient of displacement–time
Velocity.
Gradient of velocity–time
Acceleration.
Area under velocity–time
Change in displacement over the interval.
Area under acceleration–time
Change in velocity over the interval.
Constant-acceleration check
Use the SUVAT relationships only when acceleration is constant in a straight line.
Checkpoint rule
Do the check-up only after you can summarize each concept in one sentence and identify one dangerous pitfall from memory.
Knowledge Check (after reading)
Short check-up to confirm understanding of this module.
Check-up Questions
A runner completes one 400 m lap and stops at the start line. Which pair gives distance and displacement?
A trolley travels 18 m in 6.0 s. What is its average speed?
Answer all questions to submit.
Next step personalized recommendations
Continue learning
Move forward only after this module is stable.
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