earth moon sun rotation working model using single dc motor and woolen thread

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You can create a working model of the Earth-Moon-Sun rotation system using a single DC motor and woolen thread. This model will demonstrate the rotation and revolution of the Earth and Moon around the Sun.

Materials Required:

  1. DC motor (6V or 9V)
  2. Battery pack (matching the motor voltage)
  3. Switch
  4. Cardboard (for base and planetary orbits)
  5. Plastic or foam balls (for Sun, Earth, and Moon)
  6. Woolen thread (to connect Moon to Earth)
  7. Thin wooden sticks or metal rods
  8. Plastic gear system or pulley setup (optional for better motion)
  9. Hot glue gun / Super glue
  10. Color paper or paint (to decorate Sun, Earth, and Moon)
  11. Wires (for electrical connections)

How It Works:

  1. Sun Placement:
    • Attach the Sun (foam ball) to the center of a rotating base.
    • The Sun rotates while the Earth revolves around it.
  2. Earth’s Rotation & Revolution:
    • Mount the Earth on a rotating arm attached to the DC motor.
    • When the motor rotates, the Earth will revolve around the Sun.
    • The Earth also rotates on its own axis, which can be achieved by fixing a small rotating base under it.
  3. Moon’s Revolution:
    • Attach the Moon to the Earth using woolen thread.
    • When the Earth rotates, the thread pulls the Moon along, simulating Moon’s revolution around the Earth.
    • A secondary small rotating disc under the Earth can help smoothen the motion.
  4. Motor Mechanism:
    • The DC motor is fixed below the rotating base.
    • A gear or pulley system helps transfer motion smoothly.
    • When the switch is turned ON, the motor moves the Earth around the Sun, and the Moon follows Earth via the woolen thread.

Steps to Build the Model:

  1. Prepare the Base:
    • Cut a large circular cardboard for the base.
    • Attach a central axis to hold the Sun.
  2. Attach the DC Motor:
    • Fix the DC motor at the center of the base.
    • Connect it to the battery pack and switch.
  3. Build the Rotating Earth Mechanism:
    • Attach a long arm to the motor shaft.
    • Fix the Earth ball at the end of the arm so it moves when the motor rotates.
  4. Attach the Moon:
    • Use woolen thread to connect the Moon to Earth.
    • The Moon should be free to move but rotate with Earth.
  5. Final Wiring & Decoration:
    • Secure all parts properly.
    • Paint and decorate the Sun, Earth, and Moon.
    • Connect the battery and switch to control movement.

Working Explanation:

  • When the switch is turned ON, the motor rotates, causing:
    1. The Earth to revolve around the Sun.
    2. The Earth to rotate on its axis (if a secondary rotation is added).
    3. The Moon to revolve around Earth due to the woolen thread connection

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