Fulcrum
Academy

Track II · 50 min

Forces

Newton’s laws as design constraints. Free-body diagrams, friction, and the inclined plane.

0/3 lessons0%
  1. 1Newton’s three lawsInertia, net force, and pairs. Treat them as constraints on a design, not slogans.
  2. 2Free-body diagramsThe first drawing an engineer makes. If the diagram is wrong, the algebra cannot save you.
  3. 3Friction and rampsBenchThe inclined plane is not a puzzle. It is a fixture, a hopper, a road grade, a wedge.

Benches

Incline bench

Tilt a plane, draw the free-body, and watch friction decide whether the block moves.

a = g (sin θ − μ cos θ)

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