Calculate the moment of inertia of the pendulum Oberbeck if a weight of 720 g falling from a height of 1 m during the 9. pulley radius of 23 mm, and the acceleration due to gravity 9,81 m / s ^ 2. How much will decrease the moment of inertia of the pendulum Oberbeck if rods shortened twice, and loads from the ends of the rods to remove? The mass of the weight 145 grams, the weight of the rod 180 g, the initial length of the rod 0.3 m.

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