Angular Kinematics II

These flashcards cover key concepts in Angular Kinematics II, including definitions, formulas, and related quantities in biomechanics.

Angular position

Defines an object's angular location relative to a defined spatial reference system.

Angular displacement

The change in angular position; a vector quantity defined by Δθ = θFinal – θInitial.

Angular speed

The scalar quantity describing the angular distance traveled per unit time.

Angular velocity

Describes the rate of change of angular position and is represented by the Greek letter omega (ω).

Average angular velocity

Calculated using the formula ω = Δθ / Δt.

Angular acceleration

The rate of change of angular velocity, represented by the Greek letter alpha (α), calculated with α = (ωFinal – ωInitial) / (tFinal – tInitial).

First Central Difference Method (FCDM)

A method used to calculate instantaneous angular velocity and acceleration over a series of kinematic data.

Linear distance in angular motion

Calculated using the formula Δs = r * Δθ, where θ must be expressed in radians.

Tangential velocity

The instantaneous linear velocity that is tangent to the path of a rotating object.

Centripetal acceleration

The acceleration directed toward the center of a circular path, calculated with a = vT² / r.

Resultant linear acceleration

Can be calculated using the Pythagorean relationship: aR = √(aT² + aC²).