Physics - Equilibrium

OCR A-Level Physics 2022


Conditions for equilibrium

What are the two conditions for equilibrium?

  1. Net force is zero
  2. Net moment is zero

Couples

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

Is the following a couple ?

Yes.

Is the following an equilibrium ?

No.

Describe the motion as a result of ?

The object will spin with increasing angular velocity.

When do couples produce a turning effect?

When there is a perpendicular distance between them.