Ask Uncle Colin: how to do moments questions? | Colin

Ask Uncle Colin is a chance to ask your burning, possibly embarrassing, maths questions — and to show off your skills at coming up with clever acronyms. Send your questions to and Uncle Colin will do what he can.

Dear Uncle Colin,

I’m struggling to make sense of questions about moments in M1. Can you help?

— Failing Equilibrium-Related Moments… All Torque!

Hi, FERMAT! That’s a bit more general than the kind of question I usually answer, but no matter!

Here’s the briefest theory of equilibrium I can come up with.

A body is in…

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