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    two wires made of the same material but of different lengths and diameters are joined end to end and used to support a vertical load. If the weight of each wire is neglected, each wire must have -

    the answer is tensile force

    Could someone please explain why??? thanks so much!
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    Each wire must exert a force on the vertical load to resist the weight of the load. They must have tensile strength in order to be able to exert a tensile force on the load. Otherwise, the wires would just be stretched due to the weight of the load.
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    I understand this bit and I'm really sorry I've worded the question wrongly, it said they must have the same tensile force and that's the part I don't understand. Thank you for helping
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    Think about the point where they join - by Newtons third law, they must exert equal and opposite forces on each other.
 
 
 
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