Relative Motion
Explain relative motion — how the apparent speed and direction of an object depends on the observer's own motion — using everyday examples such as trains and cars passing
Lesson
Set out your lesson
“Relative Motion means practising the idea at the table with a simple hands-on check. We will demo once, then your child tries.”
Bring to the table
- A small toy car or ball
- A ramp or book stack and a ruler
Extra for the adult
Worked example. A stronger push sends the car farther down the table than a gentle push.
Optional challenge. For Relative Motion, add one harder example after success.
What to notice. Keep one parent note: examples tried; results; support used. This session samples Relative Motion, not mastery.
Share and support
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Teaching approaches
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1 approach
Relative Motion means practising the idea at the table with a simple hands-on check. We will demo once, then your child tries.
Materials: A small toy car or ball; A ramp or book stack and a ruler. 1. Say the goal of Relative Motion in plain words once. 2. Adult gives one gentle push and one stronger push, then compares how far the object travels. 3. Child tries three push or pull trials and records which force made a bigger change. 4. Fresh check: one fresh push/pull comparison. Record and stop. Done: three recorded trials with a clear force comparison. Proof: parent note of examples and results. Stop: End after the fresh check; keep optional challenge for another day.
Family records and proof options
Keep a record of your learning
Save photos, notes, and attendance. Export a proof packet for compliance or portfolio reviews.
Practice this concept
Start practiceRelative Motion practice
Practice key ideas from Relative Motion.
Free · no login · no ads · Practice answers and completion are not saved. Parent observation remains the lesson record.
Learning resources
Extra practice links — they do not replace Gakuva’s teaching approach.
PhET Interactive Simulations · Practice link — not the full lesson
Forces and Motion: Basics
Before you open · source notes
Forces and Motion: Basics supports hands-on exploration for Relative Motion. Not every lab worksheet.
Free interactive page, no sign-in required for the tested path.
Before you openAsk the learner what they changed in the sim or page and what they observed.
Opening this link does not save learning or assess mastery.
Source, access and review notes
Public PhET Interactive Simulations page. An anonymous GET on 2026-11-12 returned HTTP 200 with no login or payment prompt for this URL. Opening the link does not save practice or assess mastery. An adult should preview and guide the learner.
PhET Interactive Simulations. “Forces and Motion: Basics.” External page; Gakuva does not copy, host, embed, or redistribute materials.
Unknown — link only
Check understanding
- Explains why a train moving at the same speed in the same direction as another appears stationary to passengers on that train
- Calculates relative speed when two objects move towards or away from each other
- Explains why the frame of reference matters when describing motion
“If your child was on a train and another train passed going the same direction but faster, could they explain why it looks slow even if it's actually travelling at high speed?”
Curriculum record
- Type
- Conceptual
- Subject
- Science
- Domain
- Forces & Motion
- Age range
- Ages 11–12
Standards