a) fe=[fx,fy,fx,fy,fx,fy]T
b) fe=\(\frac{t_eA_e}{3}\)
c) fe=\(\frac{t_eA_e}{3}\)[fx,fy,fx,fy,fx,fy]T
d) fe=\(\frac{t_eA_e}{3}\)[fx,fy]T
Answer: c
Explanation: A body force is a force which acts through the volume of the body. Body forces contrast with the contact forces or the classical definition of the surface forces which are exerted to the surface of the body.
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