Finding the moment of a force about a point

[TheePhysicsStudent]

Homework Statement

Hello! I was doing this question from a textbook and I am Unsure why my answer is slightly different to that of the textbook

Relevant Equations

M = Fd
SF1 + SF2 =SFT

The Question

What I did

The Answer

 

[TSny]

Some of the data is given to only 2 significant figures. So, the answers might be rounded to 2 significant figures.

Also, the support forces at each end might be considered as acting in the middle of the 1-meter width rather than at the edge (dashed):

 

[Orodruin]

Also, the support forces at each end might be considered as acting in the middle of the 1-meter width rather than at the edge (dashed):

The problem states explicitly that the forces are assumed to act where the bridge meets the supports. I’d go with the rounding option.

 

[TheePhysicsStudent]

Ah, thank you yep, I believe it is an SF error, Thanks again for the help everyone!

 

[TSny]

The problem states explicitly that the forces are assumed to act where the bridge meets the supports. I’d go with the rounding option.

Yes, I overlooked the comment about the location of the forces. Thanks.