Question: https://www.youtube.com/watch?v=aZw39031Pvk&feature=emb_err_woyt Is the weightlifter using energy? How do you know? Where is the weightlifter using the most energy - while lifting the weights, or while

https://www.youtube.com/watch?v=aZw39031Pvk&feature=emb_err_woyt

  1. Is the weightlifter using energy? How do you know?
  2. Where is the weightlifter using the most energy - while lifting the weights, or while holding the weight overhead? What makes you think this?
  3. A physicist would say that the weightlifter is doing no work while holding the weights overhead. Do you agree with this? Why or why not?

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