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Define moment
Product of force and perpendicular distance from the point to the line of action of the force
Give two conditions in order to let an object equilibrium. [2 marks]
No resultant force and moment acting on the object
What is meant by “centre of gravity”.[1 mark]
A point of the object which entire weight of the object can be act
What is meant by “centre of mass”. [1 mark]
A point of an object which considered the entire mass of the object to be concentrated
Define couple. [1 mark]
Pair of equal and opposite coplanar force acting on a body that do not share a line of action