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Track recap

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Track recap135 min

Gravity and Orbits

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Start with one source mass creating a field and potential well, then use that same gravity model to explain circular speed, orbital periods, and the escape threshold.

About recap mode

Keep the authored order, then open the extra explanation only when you need to understand how recap is choosing the next review move.

How it works

Same authored sequence, lighter revisit.

Recap mode does not invent a second curriculum. It keeps the existing starter-track order, then changes the prompt and suggested action with the current mastery and progress signals.

Keep using concept pages

Quick tests, challenge mode, worked examples, and read-next stay where they already live.

Recap links only jump you to the most useful surface for a fast review. The simulation-first concept pages still carry the real teaching work and keep the guided path intact.

Recap steps

Revisit the track in the same authored order.

Focus badges and button targets come from the current mastery and progress signals. The next ready checkpoint still stays in the loop.

  1. 1Not startedNewNext guided step

    Gravitational Fields

    Gravitational Fields is still the next guided step in this authored order. No finished quick test, solved challenge, or completion mark is saved yet.

    Start here before moving into Gravitational Potential and Potential Energy.

    Field directionInverse-square drop25 min
    Open next step
  2. 2Not startedNewAhead

    Gravitational Potential and Potential Energy

    This concept stays in the recap because it completes the authored track story, even if you have not reached it on this browser yet.

    Builds on Gravitational Fields before setting up Circular Orbits and Orbital Speed.

    Negative potential wellsU = m phi25 min
    Preview concept
  3. 3Not startedNewAhead

    Circular Orbits and Orbital Speed

    This concept stays in the recap because it completes the authored track story, even if you have not reached it on this browser yet.

    Builds on Gravitational Potential and Potential Energy before setting up Kepler's Third Law and Orbital Periods.

    Gravity as centripetal accelerationOrbital speed30 min
    Preview concept
  4. 4Not startedNewAhead

    Kepler's Third Law and Orbital Periods

    This concept stays in the recap because it completes the authored track story, even if you have not reached it on this browser yet.

    Builds on Circular Orbits and Orbital Speed before setting up Escape Velocity.

    T^2 proportional to r^3Longer path and lower speed25 min
    Preview concept
  5. 5Not startedNewAhead

    Escape Velocity

    This concept stays in the recap because it completes the authored track story, even if you have not reached it on this browser yet.

    Capstone step after Kepler's Third Law and Orbital Periods.

    Escape thresholdTotal specific energy30 min
    Preview concept