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Biomechanics

Ch 3 Basic kinetic concepts

QuestionAnswer
Inertia resistance to acceleration (reluctance of a body to change its state of motion
Inertia units has no units but is directly proportional to mass
Mass the quantity of matter ( the amount of stuff). A direct measure of inertia
Mass units Kilograms (kg)
Force Push or pull acting on a body. If a strong enough, it may alter the body's state of motion
Force units Newtons (N)
Weight the force exerted on a body due to gravity
Weight equation W = m x g
Pressure amount of force acting over a given area
Pressure units N/m^2
Pressure equation P = F / A
Volume The amount of space a body occupies
Volume units Liters 1 liter = 1000cm^3
Density mass per unit volume
Density units kg/m^3
Density equation ρ (“rho”) = m/v
Torque rotational effect created by an off-center force
Torque unit Nm
Torque equation T = F x d⊥
Compression Squeezing force
Tension pulling force
Shear causes a portion of a segment to slide with respect to another portion
Mechanical stress Force distribution within the body likelihood of injury depends on stress
Created by: rmart11