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Sir Isaac Newton twirls his corded headphones horizontally above his head just for fun. The headphones have a mass of 0.15 kg and are held

  • Sir Isaac Newton twirls his corded headphones horizontally above his head just for fun. The headphones have a mass of 0.15 kg and are held by its cord which is 25 cm long.
  • a. If the force of tension on the cord is 5.922 N, how long does it take to make one complete revolution?
  •  
  • b. If the cord lengthens to 0.5 m and Sir Isaac Newton keeps the headphones rotating at the same speed as before, how much tension will there be in the cord?

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