World 6 · Statics & structures: trusses and beams · 10 min · PROA stable truss with the fewest bars
Counting equations and unknowns: m + r = 2j
PRO · Simple Machines
World 6: Statics & structures: trusses and beams is part of PRO
The first world of Simple Machines is free. PRO opens the other 32 lessons in 6 worlds — simulations, quizzes and all.
PRO includes
- All 26 labs — every world, every lesson
- Practice exams and certificates
$8.33/mo, billed yearly ($99.99) · or $39.99 monthly