A-Level Maths OCR A H240

Be able to calculate the moment of a force about an axis through a point in the plane of the body.

*For coplanar forces, moments may be described as being about a point.

Understanding of the vector nature of moments is excluded.*

Understand that when a rigid body is in equilibrium the resultant moment is zero and the resultant force is zero.

Be able to use moments in simple static contexts.

*e.g. To determine the forces acting on a horizontal beam or to determine the forces acting on a ladder resting on horizontal ground against a vertical wall.

Questions will be set in which the context of the problem can be modelled using rectangular laminas, uniform and non-uniform rods only.

Learners may assume that:

1. for a uniform rod the weight acts at the midpoint of the rod,
2. for a non-uniform rod the weight acts at either a specified given point or is to be determined by moments,
3. for a rectangular lamina the weight acts at its point of symmetry.*