LuduminaFM-01 · FM-U1 · Planned
Interactions, scalars and vectors
Learning objectives
Classify quantities and forces; identify both objects in an interaction.
8463 §§4.5.1.1–4.5.1.2 / 8464 §§6.5.1.1–6.5.1.2
DfE single-science pp.35–37 / Combined pp.30–32. Evidence checked 30 September–1 October 2026. Skills: WS1.2,4.1; MS5b.
Needs firstP0; EN-02 helpful
Explanation
A vector needs direction as well as magnitude. Forces describe interactions between bodies, including non-contact interactions through fields. Draw arrows for forces on the chosen object; a separate interaction-pair description identifies the other body.
Concepts, equations and units: Scalar magnitude; vector magnitude/direction; force N; contact/non-contact forces.
Prediction, demonstration and game exercise
Predict, observe, explain
Show rope, cart, magnet and Earth interactions; draw scaled arrows without implying motion direction.
Planned learner game exercise
Annotate forces on a cart in three settings and match interaction partners.
Independent practice
Explain friction, normal force, tension, gravity, electrostatics and magnetism.
Original practice example · Shared
Classify speed and velocity, then name a contact and a non-contact force.
Show working and model answer
Working / reasoning
Speed has magnitude only; velocity adds direction. Friction is contact; gravity is non-contact.
Answer
Speed scalar; velocity vector; friction/contact and gravity/non-contact are valid examples.
Exit check and success criteria
Five of six classifications correct and two valid interaction pairs.
During practice, compare the prediction with evidence and give an error-specific prompt. The exit item uses a fresh context or fresh values, answered independently.
Misconceptions, practical links and mastery
Check these misconceptions
Forces require contact; force arrows show velocity; equal opposite forces always act on one object.
Practical preparation
Optional force/magnet observations, AT2.
Virtual preparation and revision only. Required hands-on activities and school records remain separate.
Proposed mastery
0: not yet evidenced. 1: supported. 2: independent exit criteria met. 3: successful changed-context transfer. Advance at 2; revisit with fresh retrieval. These are not GCSE grades.