Physics: Newton's Laws, Work and Energy Applications Quiz
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Questions and Answers

What is the skier's acceleration if friction is 45.0 N?

  • 4.55 m/s^2
  • 2.95 m/s^2
  • 5.20 m/s^2 (correct)
  • 3.88 m/s^2

    • What is the spring constant k of the perfectly elastic spring?

  • 6.0 N/m
  • 7.0 N/m
  • 9.0 N/m (correct)
  • 8.0 N/m

    • What is the acceleration of the skier if friction is negligible?

  • 8.41 m/s^2
  • 5.88 m/s^2
  • 7.25 m/s^2
  • 6.67 m/s^2 (correct)

    • How much work is required to stretch the elastic spring an additional 6 cm?

    <p>0.72 J</p> Signup and view all the answers

    How much work did the movers do pushing the crate across a rough floor without acceleration?

    <p>259 J</p> Signup and view all the answers

    What is the net power needed to change the speed of a sport utility vehicle?

    <p>200 kW</p> Signup and view all the answers

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