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Angular momentum is the inertia of rotation motion.
Linear momentum is the inertia of translation motion.
The force related to rotation is τ=F×r
Angular momentum is mvr
The force related to linear movement is F=ΔP/Δt
Linear momentum is mv
The big difference is that the type of motion which is related to each momentum is different.
It is important to consider the place where the force related to rotation applies, which appears as 'r' in the formula.