We've looked at several analogies between straight-line motion and rotational motion, including:

Variable	Straight-line motion	Rotational motion	Connection
Displacement	x	θ	θ = x r
Velocity	v	ω	ω = v r
Acceleration	a	α	α = at r
Produces motion	F	τ	τ = r × F
Inertia	m	I	I = ∫ r2 dm
Second Law	ΣF = ma	Στ = I α
Work	W = F • d	W = τ • Δθ
Kinetic Energy	K = ½ mv2	K = ½ Iω2
Power	P = F • v	P = τ • ω