Thread: Questions based on derrick cranes

A simple derrick crane is constructed as in Figure (refer to attachment) with axes as indicated. The wires AP and BP are in tension, and the arm of the derrick, PC is loaded with a weight W at C. The x and y components of the forces at P are always in equilibrium. Determine the range of the angle theta that will ensure that the tensions T1 and T2 are always positive and hence the wires will not slacken.

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