The figure shows two solid cylindrical rods $AB$ and $BC.$ The rods are welded at $B$ and loaded as shown. Assume d$1=30mm$ and $d2=50mm.P=55kN$

Determine the normal force in rod $AB.$

$195$ kN $($tension$)$

$-55kN($compression$)$

$-195$ kN $($compression$)$

$-305kN($compression$)$

$55kN($tension$)$

$305kN($tension$)$