8.3 Torque and Rotational Equilibrium | General Physics

Chad provides a comprehensive lesson on Torque and Rotational Equilibrium and explains in detail how to solve rotational equilibrium problems. He begins with the conditions for rotational equilibrium. First, the net torque acting on the system is zero. Second, the net force acting on the system is also zero. For a 2-dimensional problem, the net force must be broken into x and y components. Chad then solves three torque and rotational equilibrium practice problems. The first rotational equilibrium problem is a straightforward example involving children playing on a see-saw. The second rotational equilibrium problem is a little more complex, involving more forces, but is still a 1-dimensional problem. The third rotational equilibrium problem is a classic physics problem with a 'boom' attached to a wall from which a sign is hung. It is a little more challenging as it is a 2-dimensional rotational equilibrium problem.

00:00 Lesson Introduction
00:44 Conditions of Rotational Equilibrium
02:06 Rotational Equilibrium on a See-Saw Problem
12:43 More Complex Rotational Equilibrium Problem
24:58 2-Dimensional Rotational Equilibrium Problem

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