Statics — Forces & Equilibrium

Equilibrium — the sums that must be zero

continues from lesson 1 — values defined earlier in the course stay live here

ELI5: if a body sits still, every push is cancelled by an equal pull. Add up the horizontal forces — they must be zero. Same for vertical. Those two equations let you solve for a force you cannot measure, like the reaction a wall provides.

W_{load} := 500 N

= 500 N a weight hanging from a bracket

R_{support} = \mathrm{solve}\left(R_{support} - W_{load}, R_{support}\right)

= 500 N the support must push up with exactly the weight

✓ pass

R_{support} == W_{load}

vertical forces balance — the bracket holds