Peoples Physics Concepts

9.1. Kinematics of Rotation http://www.ck12.org

9.1 Kinematics of Rotation

• Apply the kinematic equations for rotation.

Students will learn how to apply the kinematic equations for rotation.

Key Equations

v=rω

linear speedvis equal to the angular speed

ω

multiplied by the radius of the rotating object.

a=rα

linear accelerationais equal to the angular acceleration

α

multiplied by the radius of the rotating object.

θ(t) =θ 0 +ω 0 t+ 1 / 2 αt^2

Rotational equivalent of

x(t) =xi+vit+ 1 / 2 at^2

ω(t) =ω 0 +αt

Rotational equivalent of

vf=vi+at

ω^2 =ω^20 + 2 α( 4 θ)

Rotational equivalent of

v^2 f=v^2 i+ 2 a∆x