1. a homogeneous board of mass 11.2 kg and length 4.4 m is supported by vertical ropes fixed at its ends. An 86 kg painter is 0.6 m left of center and a 6.9 kg bucket 1.2 m right of center. Determine the modulus of the tensions t1 and t2 in the strings.

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2. The plate (or wrasse) of a pottery wheel whose moment of inertia is 0.018 x m^2 spins freely at 2.2 rad/s. A circular disk with mass 150 g and diameter 27 cm, which does not rotate initially, is placed directly in the center of the plate. (a) Determine the new angular velocity. (b) What is the variation in kinetic energy?

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