Learn how to use force diagrams to analyze the forces and torques acting on a rigid system. Explore how force and torque can lead to rolling in different situations.

An introduction to torque, a force that causes rotation. Understand how torque is calculated as the product of force and distance, and how it differs from work. Learn about the direction of torque and …

Learn how torque relates to force, position, and angle, and how force diagrams can be used to analyze forces and torques acting on a rigid system. Explore how force and torque can lead to rolling in …

It is used to calculate angular momentum and allows us to explain (via conservation of angular momentum) how rotational motion changes when the distribution of mass changes. It also is needed …

A torque is the rotational equivalent of a force. When a torque is applied to an object it causes the object to rotate. Learn how forces create torques and how to calculate the net torque on a rotating object.

So what we learned when we learned about torque is that an object won't rotate if the net torque, the sum of all the torques around it, are zero, and we're going to apply essentially that same principle here.

I'm confused about the sign usage in the last example's explanation. If we consider counterclockwise to be positive and clockwise to be negative, then shouldn't the equation be 0 = -3.5 + 2a?

I think it contradicts to your figure. Do you have a different though or am I misinterpreting it. Also could you please explain if Lorentz force and right hand rule are essentially the same.

Let's say you were tired of requiring so much torque to move this thing, you wanna make it easier to rotate. One thing you can always do is just take your masses and move them toward the axis, i.e. …

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