# Trusses (forces)

1. Jul 3, 2016

1.)
from the calculation of F(AD), the force should point towards A,right? (red arrow)
but, in the calculation of F(AB), the (1/sqrt rt2)(48.08) should be positive,right? (which is pointing towards LEFT)???

2. Relevant equations

3. The attempt at a solution
this involve the resolution of forces into vertical and horizontal axes,am i right?

2. Jul 3, 2016

### billy_joule

Positive X is rightward, as the equation HA -28 = 0 defined at the start of the solution.
Member AD was found to be in compression and so exerts a leftward force at joint A, so the term 1/(√2)(48.08) is negative.