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Pip’s lantern rescue

Pip the moth courier can fly, but the heavy message lantern is stranded beyond a service gate. Build a path for the scout robot to bring it home.

Use your Forcewright, Rune Arithmetic, and Robotics skills. Take your time. Every saved step stays on this browser for this learner.

Pip, a moth courier with a glowing lanternThe heavy message lantern case

The service gate is down.

  1. 1. Gate
  2. 2. Bridge
  3. 3. Scout

Lift the service gate

The gate weighs 120 N. Your winch can pull with at most 20 N. Choose a lever arm and pulley strands, then test your rig.

120 NEffort arm ×11 supporting strandIdeal model · friction ignored

Effort: 120 ÷ (1 × 1) = 120.0 N · limit 20 N

Show me the idea

Multiply the arm advantage by the number of supporting pulley strands. Divide the 120 N load by that advantage. Any rig using 20 N or less can lift this model gate.

Practice with the Forcewright
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