An ornament for a courtyard at a word's fair is to be made up of four identical, frictionless metal spheres, each weighing 2√6 N . The spheres are to be arranged as shown, with three resting on a horizontal surface and touching each other; the fourth is to rest freely on the other three. The bottom three are kept from separating by spot welds at the points of contact with each other. Allowing for a factor of satety of 3, the tension the spot welds must withstand is

An ornament for a courtyard at a word's fair is to be made up of four

1.	An ornament for a courtyard at a word's fair is to be made up of four identical, frictionless metal spheres, each weighing 2√6 N . The spheres are to be arranged as shown, with three resting on a horizontal surface and touching each other; the fourth is to rest freely on the other three. The bottom three are kept from separating by spot welds at the points of contact with each other. Allowing for a factor of satety of 3, the tension the spot welds must withstand is
Answer» An ornament for a courtyard at a word's fair is to be made up of four identical, frictionless metal spheres, each weighing $2 \sqrt{6} N$ . The spheres are to be arranged as shown, with three resting on a horizontal surface and touching each other; the fourth is to rest freely on the other three. The bottom three are kept from separating by spot welds at the points of contact with each other. Allowing for a factor of satety of 3, the tension the spot welds must withstand is

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