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**Two Physics Problems .. plsss help ??!!**

__Q1 :__The figure shows a mass M inside a tube bent in a circle of radius R=1.20 m. M can slide with negligible friction inside the tube. The tube rotates about a vertical axis passing through the center. The mass is in equilibrium at q =56.5 degrees. Calculate the number of revolution the hoop makes in 12.0 s.

THE FIGURE : http://www3.0zz0.com/2006/12/22/10/35335598.gif [Broken]

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__Q2__A 8.40 kg mass suspended from a spring with spring constant, k = 800.0 N/m, extends it to a total length of 0.270 m. Find the total length of the spring when a 13.40 kg mass is suspended from it.

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