# Physics - Equilibrium

> Source: https://ollybritton.com/notes/a-level/physics/topics/equilibrium/ · Updated: 2025-11-15 · Tags: physics, school, year-1

##### What are the two conditions for equilibrium??
1. Net force is zero
2. Net moment is zero

##### What is the name for two forces in an arrangement like the following??
PHOTO

##### Is the following a couple PHOTO??
Yes.

##### Is the following an equilibrium PHOTO??
No.

##### Describe the motion as a result of PHOTO??
The object will spin with increasing angular velocity.

##### When do couples produce a turning effect??
When there is a perpendicular distance between them.

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