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World 6 · Release, shape and hollow hulls · 8 min · PRO

Same volume, different journey

PRO · Forces & Motion

World 6: Release, shape and hollow hulls is part of PRO

The first world of Forces & Motion is free. PRO opens the other 50 lessons in 11 worlds — simulations, quizzes and all.

  • A release takes time
  • How the same metal can float
  • A launch on Earth and on the Moon
  • When does a block start to slip?
  • Sliding: net force and acceleration
PRO includes
  • All 26 labs — every world, every lesson
  • Practice exams and certificates

$8.33/mo, billed yearly ($99.99) · or $39.99 monthly

Unlock Forces & MotionTry the free world
← A release takes timeHow the same metal can float →

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