Equilibrium in 2D (Edexcel A-Level Mathematics): Flashcards

$\sum F_x = 0$

$\sum F_y = 0$

Object in equilibrium where all forces sum to zero

Identify forces → Resolve components → Apply $\sum F = 0$ → Solve

$\frac{1}{2}$

$\frac{\sqrt{3}}{2}$

$\frac{1}{2}$

Yes, all concepts (equilibrium, $F=ma$, SUVAT) apply in 3D

Sum of all force vectors equals zero vector

$\sqrt{x^2 + y^2 + z^2}$

Same throughout the string

To split forces into horizontal and vertical parts