The rod ABC is made of aluminum.
Modulus of Elasticity, $E = 70$ GPa $= 70 \times 10^9$ Pa.
Force $P = 6$ kN $= 6 \times 10^3$ N.
Force $Q = 42$ kN $= 42 \times 10^3$ N.
Segment AB:
Length, $L_{AB} = 0.4$ m.
Diameter, $d_{AB} = 20$ mm $= 0.020$ m.
Area, $A_{AB} =
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