Definitions 2024/12

Front

Newton’s first law of motion

Back

A body continues at rest or constant velocity unless acted on by a resultant force.

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Mass

Back

The property of a body which resists change in motion.

Front

Weight

Back

The force experienced by a mass when in a gravitational field.

Front

Center of gravity

Back

Point at which whole weight of body may be considered to act.

Front

Moment of a force

Back

The product of force and the perpendicular distance of the force from the pivot.

Front

Couple

Back

A pair of forces, equal in magnitude but opposite in direction, whose lines of action do not coincide.

Front

Torque of a couple

Back

The product of one force and the perpendicular distance between two forces.

Front

Conditions for equilibrium

Back

1. The resultant force in any direction is zero; 2. The resultant moment of forces about any point is zero.

Front

Principle of moment

Back

For a body in rotational equilibrium, the sum of the clockwise moments about a point is equal to the sum of anticlockwise moments about the same point.

Front

scalar

Back

physics quantity that has magnitude only.