Is the Origin for a Sawhorse at C or -D/2?

[sjogosk]

Summary: So we are just going to ignore the distance between C and the left support point (-D/2)? If the origin is at C, doesn't this mean M is -D/2 from the origin? In the evaluation, they clearly acknowledged that there is a distance between C and xp which is (-D/2)...

 

[jbriggs444]

You wish to discuss a solution to a problem without stating or displaying the problem?

If the origin is at C, doesn't this mean M is -D/2 from the origin?

If the origin is at C and the center of mass of the plank (M) is at C then this means that M is 0 from the origin, surely.

 

[sjogosk]

Oh okay yeah I misread the question..the M is the mass of the plank not some other object. Thanks