Statics

Question 1

Centre of gravity

Answer 1

The point through which all the weight appears to act

Question 2

Centre of mass

Answer 2

The point though which all of the mass can be considered to be concentrated

Question 3

Moment of a force

Answer 3

The product of the force and the perpendicular distance from the axis to the line of action of the force

Question 4

Moment of a force about its own line of action

Answer 4

0Nm

Question 5

Principle of moments

Answer 5

When a body is in equilibrium, the algebraic sum of the moments is zero about any point

Question 6

Couple

Answer 6

Two forces that are equal and opposite, parallel but not collinear. (Turning effect but no resultant force)