Statics - 3D Moment about an axis example 3

[kasra-irio]

5:38 mmmmkaaay mr.mackey 😅😅

Thank you

[edgardchow]

awesome video, super simple explanation :)

[Abdulaziz-Alsoufi]

Why didn't you break F to its component as you did in the previous problem?
Also, when do you know when to break F to its component or to just use what's given in the diagram like this problem when you used F=-300 N?


Thank

[rameesmonk]

A small doubt does the negative sign indicate the direction is opposite to u?

[KilluaZoldyck-tzsz]

thank u sir, but can you try solving, using rc? I tried it but i got a different answer

[dmr]

Why the "j" in cross product matrix determinant got minus value?

[laurenpadron]

I used AC for the position vector where I divided {0.6, 0, 0.3} by the magnitude (sq.root of 0.6^(2)+0.3^(2)). My triple product matix looks identical except I used this other position vector {0.8944, 0.4472, 0}. I've looked it over a considerable amount of times, but am still not getting 80.5 for the momentum's magnitude. Has anyone else run into this? The magnitude I'm getting is 119.9927.