BYT O’Brien

MOMENTS

O

F

dMoment of F about O = Fd

Anticlockwise moments are taken as positive

Units = Nm

If a rigid body is in equilibrium the resultant force is 0 and the total moment about any point is 0.

When a rod resting on two supports is about a pivot about one of the supports, the reaction at the other support is 0.

B C

A D

CENTRE OF MASS

VARIABLE ACCELERATION

UNIFORM CIRCULAR MOTION

WORK, ENERGY AND POWER

HOOKE’S LAW