A 1.0-m-long massless rod is pivoted at one end and
Chapter 9, Problem 72(choose chapter or problem)
A 1.0-m-long massless rod is pivoted at one end and swingsaround in a circle on a frictionless table. A block with a holethrough the center can slide in and out along the rod. I nitially,a small piece of wax holds the block 30 cm from the pivot.The block is spun at 50 rpm, then the temperature of the rod isslowly increased. When the wax melts, the block slides out tothe end of the rod. What is the fi nal angular speed? Give youranswer in rpm.73. II A 200 g puck revolves
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