Everything that spins, pivots, and turns. Unit 1 and 2 reborn in angular form — five episodes that take rotation from description to Newton's Laws to equilibrium.
Episode Guide — Season 5
Unit 1 revisited — same three equations, new variables. Angular displacement, velocity, and acceleration describe every spinning object.
Force causes linear acceleration. Torque causes angular acceleration. Where you apply the force — and at what angle — determines how effectively it rotates a system.
Mass resists linear acceleration. Rotational inertia resists angular acceleration — and it depends not just on how much mass, but on how far that mass sits from the axis.
F_net = ma for spinning systems becomes tau_net = I*alpha. The rotational version of the most powerful law in mechanics.
When net torque is zero, angular velocity stays constant. Static equilibrium requires both zero net force AND zero net torque — two conditions, not one.