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c) A penny sits 12 cm from the center of a record turning at 33 1/3 rpm. What is the tangential speed in m/s?

d) A mass spins with a tangential speed of 1.2 m/s on the end of a string which is 0.75m long. What is the period of the rotation in seconds?

  • Physics -

    c. C = pi*2r = 3.14*24cm = 75.4cm=0.754 m.

    V=33.33rev/min*0.754m/rev*1min/60s = 0.42 m/s.

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