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Mechanics · Physics

Energy Skate Park Simulation

Drop a skater onto a ramp, a loop or a track you bend yourself. Watch kinetic, potential and thermal energy trade places while the total stays constant.

Interactive virtual lab · no download · works on phones and laptops

Chapter
Work, Energy and Power
For
Class 9 · Class 11 · NEET
Time
~15 min

How to use it

  1. 1Drag the skater onto the track and let go.
  2. 2Pick a track, or drag its control points to reshape it.
  3. 3Change mass, friction and gravity.
  4. 4Show the bar chart, pie chart, energy graph and speed.

What to notice

  • Without friction, KE + PE stays constant: the skater returns to the same height.
  • Speed at the bottom depends on the drop height, not on the mass.
  • Friction turns mechanical energy into thermal energy.
  • Changing the reference height changes PE, but not the motion.

For teachers

Teach it in 22 minutes

A lesson plan, questions to put to the class, a quick quiz you can project or print, and the formulas behind Energy Skate Park.

  1. 1Hook

    ~2 min
    • Ask: “If I let the skater go from the top of the ramp, how high will they get on the other side?” Drop them with friction off.

  2. 2Demonstrate

    ~9 min
    • Drag the skater onto the track and let go.
    • Pick a track, or drag its control points to reshape it.
    • Change mass, friction and gravity.
    • Show the bar chart, pie chart, energy graph and speed.

  3. 3Pause and ask

    ~5 min
    • Have a student say this in their own words: Without friction, KE + PE stays constant: the skater returns to the same height.
    • Have a student say this in their own words: Speed at the bottom depends on the drop height, not on the mass.
    • Have a student say this in their own words: Friction turns mechanical energy into thermal energy.
    • Have a student say this in their own words: Changing the reference height changes PE, but not the motion.

  4. 4Check

    ~6 min
    • Run the 6-question quiz below: project it and take answers by show of fingers (1–4), or print it as a worksheet.

About the Energy Skate Park simulation

A skater on a frictionless track is the cleanest example of conservation of mechanical energy: as she drops, potential energy mgh turns into kinetic energy ½mv², and back again as she climbs. The total stays the same, so her speed at any point depends only on how far below her starting height she is.

In this energy skate park simulation you build or choose a track, change the skater's mass and gravity, switch on friction, and watch pie charts and bar graphs of kinetic, potential and thermal energy update live. With friction on, mechanical energy slowly turns into thermal energy and the skater can no longer reach her starting height. It fits Work, Energy and Power in Class 9 and Class 11.

Also covers: conservation of energy, kinetic energy, potential energy, thermal energy, friction, roller coaster.

Frequently asked questions

Does a heavier skater go faster down the ramp?

No. Mass cancels from ½mv² = mgh, so v = √(2gh) is the same for any mass when there is no friction.

Where does the energy go when there is friction?

It becomes thermal energy — the track and skater warm up. The total energy is still conserved, but mechanical energy is not.

Can the skater go higher than where she started?

Not on her own: that would need more potential energy than she had at the start.

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