Angular Motion

Presentation of

Angular Motion

By Elsdon Jenner

INDEX

Levers

Centre of Mass

Torgue

Axes of Rotation

Centre of Mass

Centre of mass

1. The centre of mass of a body is where the mass is considered to be concentrated. It is the point at which it is balanced in all directions. ... Athletes standing still in a 'normal position have one centre of mass (lower for women than men) but this can be altered by the raising of the arms or straddling of the legs.
2. Centre of the mass of an object allows us to apply Newton's laws of motion to finite objects (objects of measurable size) by considering these objects as point objects.

Video Description

Levers

Description of Levers

1. A lever system is a rigid bar that moves on a fixed point called the fulcrum when a force is applied to it. Movement is made possible in the human body by lever systems that are formed by our muscles and joints working together. An understanding of the levers in the body helps us to understand how movement is possible.

Torgue

Description of torgue

1. Simply stated, torque is the ability of a force to cause rotation on a lever (moment of force). The more detailed definition of torque is that it is a force applied over a distance (lever arm) that causes rotation about a fulcrum (axis of rotation).

Axes of Rotation

Axes of Rotation in sport

1. In reference to human anatomy, axis of rotation is an imaginary line that projects through the pivot/rotation point in a joint for example, the axis of rotation for flexing and extending the arm projects through the elbow joint. Joints rotate in these axes, allowing movement to occur in the planes of movement.

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