- #1

masterchiefo

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## Homework Statement

An OAB pipe is embedded in O. A cable BC = 1000N and F = ( 0,-f , 0) act on B.

Question:

Determine the magnitude of the force F as the resultant moment about the axis OA is canceled.

Picture in attachment:

## Homework Equations

## The Attempt at a Solution

O=(0 0 0)

A=(1.5 0 0)

B=(1.5 -sin(40)*0.75 cos(40)*0.75)

C=(0 0.6 1.2)

VTBC= 1000*unit(C-B)

VF=(0 -f 0)

VO=(0 Oy Oz) ==translation forces at o

vMo=(0 momenty momentz) == rotational forces at o

translation equilibrium = VO + VTBC + VF = (0 0 0)

VFxrOB*uAO => crossP(b-o,vf)*unitV(a-o)= (0 0 0)

crossp function = cross product of two vectors.

unitV function = unit vector

F = ??

Calculating moment from an axis is confusing me a lot.

I thank you in advance for helping me.

#### Attachments

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