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Forensic Crash Reconstruction

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Grades 6-860-75 minSource: Creative Dad Company

Using skid-mark evidence and simple measurements, young investigators calculate speed and impact angles to reconstruct how a toy-car crash happened.

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Prep: 15 minActivity: 35 min1 session~$1/groupOne table or a clear section of floorBeginner-friendly

Setup

Print or hand-copy the essential prompt for Forensic Crash Reconstruction, then set out only paper, pencils, and the common or recycled items needed for one test. Use a tabletop representation whenever the original version mentions a room, specialized device, or digital tool; the learning comes from the decisions and evidence, not elaborate scenery.

Activity

  1. Define the central success test in Forensic Crash Reconstruction and make a paper planning sheet for the inputs, actions, and expected result.
  2. Represent the system without electronics by using labeled cards, paper controls, tokens, a ruler, or a student acting as the device; follow the same cause-and-effect rules described in the project.
  3. Run at least three cases, including one difficult or unexpected case, and record evidence source, measurement method, uncertainty, and confidence rating.
  4. Revise one rule, layout, mechanism, or decision after the failed case, repeat it, and explain with the recorded evidence whether the change worked.

Done when: The group has completed Forensic Crash Reconstruction when it can present the reconstructed crash sequence like a courtroom expert witness, showing the measurements that support the conclusion and point to the observation, measurement, comparison, or trial that supports its conclusion.

Materials

toy cars, ramps or books, flour or chalk dust, measuring tape, protractor, graph paper

Shown for the Quick Start version — switch tabs above to see what changes.

Disclosure: Materials links below go to Amazon. As an Amazon Associate, Creative Dad Company earns from qualifying purchases at no extra cost to you.

Steps

  1. Examine a staged crash scene of skid marks and scattered debris and predict the car's speed and direction before impact.
  2. Set up a controlled ramp launch with flour-dusted track so each test run leaves measurable skid marks.
  3. Measure skid length and angle across several runs, notice the results don't perfectly match predictions, and account for the uncertainty when recalculating speed.
  4. Present the reconstructed crash sequence like a courtroom expert witness, showing the measurements that support the conclusion.

Standards it satisfies

  • NGSS · MS-PS2-1

    Apply Newton's Third Law to design a solution to a problem involving the motion of two colliding objects.