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Biomechanics
Biomechanics Definitions
15
Physics
Undergraduate 2
10/20/2008

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Term
Force
Definition
The medium by which energy does work
Term
Matter
Definition
A physical body or substance that occupies space and can be perceived by one or more sense
Term
Work
Definition
A transfer of energy from one system to another
Term
Energy
Definition
The capacity of a physical system to do work
Term
Contact
Definition
Two or more bodies of matter that are sufficiently close together that weak force interactions cause them to deform or accelerate
Term
Sliding Friction
Definition
Force of rotation acting on bodies in contact to resist sliding between the bodies
Term
Static Friction
Definition
The force of static friction resists movement
Term
Maximum Static Friction
Definition
At impending motion, the force of static friction reaches its maximum value
Term
Kinetic Friction
Definition
Once motion starts the force of friction is reduced to a constant kinetic friction
Term
Moment
Definition
Measure of the tendency of force to cause a body to rotate about a point/axis
Term
Moment Arm
Definition
The perpendicular distance from the line of action of a force to a point or axis of rotation
Term
Magnitude of a Moment (Torque)
Definition
The product of the magnitude of a linear force tending to cause rotation about its moment arm
Term
Centre of Mass
Definition
Point about which all of the bodies points of mass are equally distributed in space
Term
Center of Gravity
Definition
The point about which the torques created by the weight of each part of the body are balanced
Term
Radius of Gyration
Definition
The effective distance of the mass of a body from its center of rotation
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