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World 8 · Block on a ramp: friction and net force · 8 min · PRO

Sliding: net force and acceleration

Kinetic friction and F = m·a

PRO · Forces & Motion

World 8: Block on a ramp: friction and net force 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.

  • When does a block start to slip?
  • Push up the ramp: which way does friction point?
  • Moving in a circle at a steady speed
  • A car on a flat curve
  • The banked curve
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