Physics - Moments

Gap-Filling Quiz

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The point at which the whole weight of a body appears to act is called its centre of .
The moment of a force about a point is the force x the distance from the point to the line of action of the force. The unit of the moment is the metre.
The principle of moments states that when a body is in , the sum of the moments about any point is equal to the sum of the anti-clockwise moments about that point.
A lever is a body that is free to rotate about a fixed point called the .
A body is in equilibrium when the of the forces in any direction is zero, and the sum of the about any point is zero.
A couple consists of two forces with the same magnitude, but acting in directions. The moment of a couple is the of one of the forces and the perpendicular between the two.