SubjectPaid lesson
Equation of forces II
CT
ClassNotes Team 3 MIN READUPDATED 4 JUL 2026Physics SSS2 First Term
Sub Theme: Interaction of matter, space and time
WEEK 7
Equation of forces II
Performance Objectives
Students should be able to;
1. Explain what is meant by the centre of gravity of a body.
2. Identify its position for some regular uniform bodies.
Couple
Content
A couple is a system of equal and opposite forces acting at a distance apart and whose lines of actions do not coincide. A couple will always create a turning effect about a point midway between the two forces.
The forces of a couple create a torque. Couple causes an angular acceleration.
The moment of a couple = F × d
The perpendicular distance between the two forces is called the …