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# BIOMEC-Chapter 10-15

### BIOMEC- Chapter 10-15

WordDefinition
kinematics the form, pattern, or sequencing of movement with respect to time
linear displacement change in location
linear velocity the rate of change in location displacement/time
acceleration the rate of change in linear velocity change in velocity/time
relative angle angle at a joint formed between the longitudinal axes of adjacent body segments
absolute angle angular orientation of a body segment with respect to a fixed line of reference
angular displacement change in angular position
angular velocity the rate of change in angular position angular displacement/time
angular acceleration the rate of change in angular velocity change in angular velocity/time
law of inertia a body will maintain a state of rest or constant velocity unless acted on by an external force that changes the state
law of acceleration a force applied to a body causes acceleration of that body
law of reaction for every action there is an equal and opposite reaction
friction a force acting over the area of contact between two surfaces
momentum quantity of motion possessed by a body
principle of conservation of momentum in the absence of external forces, the total momentum of a given system remains constant
impulse the product of a force and the time interval over which the force acts
mechanical work the product of a force applied against a resistance and the displacement of the resistance in the direction of the force
mechanical power the rate of work production
mechanical energy the capacity to do work
kinetic energy energy of motion
torque the rotary effect of a force about an axis of rotation
moment of inertia represents resistance to angular acceleration
fluid a substance that flows or continuously deforms when subjected to a shear stress
laminar flow smooth, parallel layers of fluid
turbulent flow mixing of adjacent fluid layers
Archimedes' principle buoyant force acting on a body is equal to the weight of the fluid displaced by the body
floating occurs when the buoyant force is greater than or equal to the body weight
drag a force caused by the dynamic action of a fluid that acts in the direction of the freestream fluid flow
form drag a pressure differential between the lead and rear sides of a body moving through a fluid
wave drag the generation of waves at the interface between two different fluids such as air and water
lift a force acting on a body in a fluid in a direction perpendicular to the fluid flow
foil a shape capable of generating lift in a fluid
Bernouli principle an expression of the inverse relationship between relative velocity and relative pressure in fluid flow
Magnus effect deviation in the trajectory of a spinning object toward the direction of spin
Created by: afetterolf