Motion in a circular path about an axis of rotation. This is created by applying an external force outside the centre of mass.
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Centre of Mass
The point at which all forces are equal in all directions and weight acts downwards.
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Fulcrum
Fixed point of rotation about which levers move.
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Effort
The muscular force applied to create the motion of a lever.
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Load
The resistance or weight to be moved.
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Moment of Force
The effectiveness of a force to create rotation about an axis.
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Angular Distance
The angle through which a body has rotated about an axis in moving from the first position to the second.
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Angular Displacement
The shortest change in angular position. It is the smallest angle through which a body has rotated about an axis in moving from the first position to the second.
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Angular Analogue of Newton’s Law 1
A rotating body continues to turn about its axis of rotation with constant angular momentum unless acted upon by an external torque.
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Angular Analogue of Newton’s Law 2
The rate of change in the angular momentum is directly proportional to the size of the external torque/ moment of force applied, and in the same direction.
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Angular Analogue of Newton’s Law 3
– For every torque that is exerted by one body on another, there is an equal and opposite torque exerted by the second body of the first.
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Moment of Inertia
The resistance of a rotating body to change its state of motion.
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Other cards in this set
Card 2
Front
The point at which all forces are equal in all directions and weight acts downwards.
Back
Centre of Mass
Card 3
Front
Fixed point of rotation about which levers move.
Back
Card 4
Front
The muscular force applied to create the motion of a lever.
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