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ScienceHistoryArt

Newton's Cradle Timeline

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Grades 9-1260-75 minSource: Creative Dad Company

Students build a working Newton's cradle to test momentum conservation for themselves, then illustrate a timeline connecting their result to the physicists whose ideas made it possible.

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Prep: 10 minActivity: 30 min1 session~$2/groupOne table for the Newton's Cradle Timeline evidence and prototypeBeginner-friendly

Setup

Print or handwrite the four Newton's Cradle Timeline challenge steps and place common paper supplies on one table. Prepare one small sample, dataset, scenario, or recycled-material model drawn directly from the project description; no device, paid tool, room decoration, or purchased kit is required.

Activity

  1. Read the Newton's Cradle Timeline challenge aloud, then predict what will happen if one ball is pulled back and released into a row of resting balls, versus two balls being released together.
  2. Use paper, index cards, recycled objects, or facilitator-provided sample data to build the frame and hang the balls at equal lengths so they all just touch in a resting row.
  3. Run one tabletop trial and test single and multiple ball releases, recording how many balls swing out on the far side each time and connecting the pattern to conservation of momentum.
  4. Finish by illustrate a timeline poster tracing the idea from Galileo's early motion experiments through Huygens and Newton, and mark where your own test result fits in that history; record the evidence that supports the decision.

Done when: The group completes a defensible Newton's Cradle Timeline solution, records at least one test result or comparison, changes one claim or design in response, and supports its final decision with that evidence.

Materials

5-7 identical marbles or steel balls, string, hot glue, a sturdy cardboard or wood frame, ruler

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Steps

  1. Predict what will happen if one ball is pulled back and released into a row of resting balls, versus two balls being released together.
  2. Build the frame and hang the balls at equal lengths so they all just touch in a resting row.
  3. Test single and multiple ball releases, recording how many balls swing out on the far side each time and connecting the pattern to conservation of momentum.
  4. Illustrate a timeline poster tracing the idea from Galileo's early motion experiments through Huygens and Newton, and mark where your own test result fits in that history.

Standards it satisfies

  • NGSS · HS-PS2-2

    Use mathematical representations to support the claim that the total momentum of a system of objects is conserved when there is no net force on the system.