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A 4.00 kg block 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 (Figure 1) and the
tension in the upper string is 72.0 N.
a) What is the tension in the lower cord?
2.00 m
1.25 m
4.00 kg
1.25 m
b) What is the speed of the block?

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