Determine the force in member jk of the truss, and state if the member is in tension or compression.
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this problem is very similar and the following concepts need to be clear.
1) The tension: it is when the forces go outwards, for example the cable of a lamp that hangs, one force is the ceiling and the other, the weight of the lamp.
2) Compression: it is when external forces are made from the outside towards the center.
it must also be clear to make graphs along the axis J and K
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