If forces acting on an object are unbalanced then there is a net force acting that accelerates the object. The net force and acceleration always act in the same direction.

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Weight

(Of an object) is the gravitational force acting upon it.

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The Centre Of Mass

(Of an object) is a point through which any externally applied force produces straight line motion but no rotation.

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The Centre Of Gravity

(Of an object) is an imaginary point where the entire weight of an object appears to act.

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Non-Linear Motion

Describes the motion of a body when the acceleration is not constant.

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Drag

A frictional force experienced by an object moving through a fluid that opposed the motion of the object.

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The Moment Of A Force

The turning effect of a force about a point and is the product of the force and the perpendicular distance of the line of action of force from the point of rotation.

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The Principle Of Moments

States that for a body in rotational equilibrium, the sum of the anti-clockwise moments about any point is equal to the sum of the clockwise moments about that same point.

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A Couple

Consists of 2 equal and opposite parallel forces separated by a perpendicular distance.

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Density

(Of a substance) is its mass per unit volume.

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Archimede's Principle

States that the upthrust exerted on a body immersed in a fluid, whether fully or partially submerged, is equal to the weight of the fluid that the body displaces.

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Other cards in this set

Card 2

Front

(Of an object) is the gravitational force acting upon it.

Back

Weight

Card 3

Front

(Of an object) is a point through which any externally applied force produces straight line motion but no rotation.

Back

Card 4

Front

(Of an object) is an imaginary point where the entire weight of an object appears to act.

Back

Card 5

Front

Describes the motion of a body when the acceleration is not constant.

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