Statics Example: 3D Moments

[@hiyoryan3901]

How come we don't use a unit vector for r?

[@karimkhan1312]

this lecture is extra ordinary= amarjit advocate delhi high court india

[@yosfaltemeeemi9374]

You are the best I swear

[@angeloumagboo8848]

thank youuu

[@karimkhan1312]

sir = please solve more problems in 3 d statistics

[@kennethshum1268]

thanks!

[@iconickjlee4960]

why does k has a 0 value??? wa have 0.4m z axis

[@HdGrazia]

IcoNick JLee the problem asked to look for the Moment about point A. If it asked for the Moment about point O, then r will be r = 0.2i + 1.2j + 0.4k It really depends on which point is being asked from.

[@muhammedhassan7747]

R=(0.2i+1.2j+0.4k)??? right ?? then cross product ??

[@mohfa1806]

Since the distance vector is from A not O

[@kailm.5107]

No because r is the direction vector from point A to point F.

[@radthought4458]

Excuse me sir why didn't you use lambda thank you

[@karimkhan1312]

sir k = 0.4 ?

[@CallMeTripp]

In this case it would be k = 0 since the r is the distance between A and B, so since both A and B are on the same z-plane, k = 0.

[@kingsleyandrews1284]

No it is from the Point A not point O