Definition of Moment of a Force
Principles of Moments
Application of the Principle in Solving Problems
Moments of a Force:
The moment of a force about a reference point is defined as the product of the force and the force arm. Moment of a force is a vector quantity and its units is Nm.
The direction of movement or sense of movement about the point is duly considered.
The object can move in clockwise moment and ant-clockwise moments about the given point.
Centre of Gravity:
The centre of gravity of a uniform plank or rod is the midpoint of the plant or rod
A uniform beam PQ of length 100cm and of weight 35N lies on a support 40cm from the end P. Weights 54N and W are attached to the ends P and Q respectively to keep the beam in equilibrium. Find the value of W, to the nearest whole number.
Read Rotational Equilibrium and Principle of Moments. Page 178-185 of Further Mathematics Project III.