A steel ball (density = 7860 kg/m3) with a diameter of 6.4 cm is lied to an aluminum wire 82 cm long and 2.5 mm in diameter The ball is whirled about in a vertical circle with a tangential speed of 7.8 m/s at the top of the circle and 9.3 m/s at the bottom of the circle. Find the amount of stretch in the wire (a) at the top and (b) at the bottom of the circle.
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