# OCR A2 P.E Biomechanics - Angular Motion

Everything you need to know about Angular Motion. Let me know if there is anything that needs editing or adding in. Thank you! I hope it helps

- Created by: Colette McGreevy
- Created on: 21-03-13 21:54

First 374 words of the document:

Biomechanics Angular Motion

Glossary

Angular Motion Motion in a circular path about an axis of rotation. This is created by applying an

external force outside the centre of mass.

Centre of Mass The point at which the body is balance in all directions.

Fulcrum The fixed point of rotation about which the leaver moves.

Effort The muscular force applied to create the motion of a lever.

Load The resistance or weight to be moved.

Moment of Force The effectiveness of a force to create rotation about an axis.

Angular Distance The angle through which a body has rotated about an axis in moving from the first

position to the second.

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.

Angular Speed The angular distance travelled in a certain time.

Angular Distance (Radians)

Time Taken (Seconds) = Angular Speed (Radians per second)

Angular Velocity The angular displacement travelled in a certain amount of time.

Angular Displacement (Radians)

Time Taken (Seconds) = Angular V elocity (Radians per second)

Angular Acceleration The rate of change of angular velocity.

Angular V elocity (Radians per second)

Time Taken (Seconds) = Angular Acceleration (Radians per second2)

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.

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.

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.

Moment of Inertia The resistance of a rotating body to change its state of motion.

Sum of the mass of the body(Kgs)X Distance of the mass from the axis of rotation 2 = M oment of Inertia (Kgm2)

Angular Motion

## Comments

No comments have yet been made