Question

Can anyone tell me what the dots mean in this equation?

Thankyou

equations can be wr ucture Flx0 ch joint, one at a time,a truss members at that will be evident whether

Answer 1

$\sum$ F_x=0(upward forces= downward forces)

The same equation has been sent by you but written in a different style.Different authors use different notations.

Here dots simply show that the forces in upward direction are equal to the forces in downward direction.

Hope I answered your question.

Thank you.