3. The 4.0 kg block in the figure is attached to a vertical rod by means of two strings. When the system rotates about the
3. The 4.0 kg block in the figure is attached to a vertical rod by means of two strings. When the system rotates about the axis of the rod, the strings are extended as shown in the gure and the tension in the upper sting is 80.0 N. a} What is the tension in the lower string? b) What is the speed of the block? 2.00 m
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