Consider a truss designed to support some maximum weight W on a frictionless, horizontal surface. The truss has three straight members joined as in the letter "A," and all members of the truss are weightless. W is placed at the apex of the truss. The force(s) at the center of the horizontal cross member is (are)
A) compressional.
B) tensional.
C) either of the above, depending on the vertical location of the horizontal cross member.
D) none of the above.

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The Answer of Consider a truss designed to support some maximum weight W on a frictionless, horizontal surface. The truss has three straight members joined as in the letter "A," and all members of the truss are weightless. W is placed at the apex of the truss. The force(s) at the center of the horizontal cross member is (are)
A) compressional.
B) tensional.
C) either of the above, depending on the vertical location of the horizontal cross member.
D) none of the above.

Consider a Truss Designed to Support Some Maximum Weight W