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Biomechanics
Ch 3 Basic kinetic concepts
Question | Answer |
---|---|
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 |