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1. Two similar cylindrical polished bars weighing 5.00 N each lie next to one another in contact. A third similar bar is placed on the other two in the groove between them. Neglecting friction what horizontal force on each other is necessary to keep them together?
2. Many presses and other tools make use of the toggle, which is a pair of bars jointed together so as to form a very obtuse angle between them. When a 20 N force is exerted on the joint along the angle besector, the opposite ends of the bars may exert very larger forces on their restraints. If the angle at the joint is 170O , find the two horizontal forces necessary to hold the system in equilibrium. [Ans. 74N]

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    2.5 n

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    POTA

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