A-LEVEL PHYSICS: 11.1.6: Angular Momentum (SaveMyExams) Flashcards
momentum (p) = …
p = mv
angular momentum (L) = …
L = Iω
angular momentum = moment of inertia * angular velocity
moment of inertia (I) = …
I = mr^2
angular velocity (ω) in terms of linear velocity (v) = …
ω = v/r
as with linear momentum, angular momentum is…
always conserved
angular momentum is always…
conserved
principle of conservation of angular momentum:
the angular momentum of a system always remains constant, unless a net torque is acting on the system
the principle of conservation of angular momentum law has many real-world applications, eg:
-a person on a spinning chair spins faster while their arms and legs are contracted an slower while extended
-ice skaters can control their ω by extending/contracting their arms
greater mass distribution around axis of rotation = …
greater moment of inertia
larger radius = …
smaller ω
smaller mass distribution around axis of rotation = …
smaller moment of inertia
smaller radius = …
higher ω
