Work, Power, and Energy Quiz
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Questions and Answers

Which of the following statements about power is correct?

  • Power has the unit of joules
  • Power and energy are the same thing
  • Power is the rate of doing work or transferring energy (correct)
  • Power is independent of time

    • What is the unit of work?

  • Pascal
  • Watt
  • Newton
  • Joule (correct)

    • Which of the following is a scalar quantity?

  • Acceleration
  • Velocity
  • Force
  • Work (correct)

    • When is kinetic energy of an object the highest?

    <p>In free fall</p> Signup and view all the answers

    Which of the following formulas correctly calculates the work done by a constant force on an object?

    <p>$W = Fd \cos \theta$</p> Signup and view all the answers

    In the context of work, power, and energy, which of the following statements about potential energy is accurate?

    <p>Potential energy is always positive and never zero.</p> Signup and view all the answers

    Which of the following factors can affect the kinetic energy of an object?

    <p>The object's mass and speed</p> Signup and view all the answers

    When a force is exerted on an object but does not result in any displacement, the work done by this force is:

    <p>Zero</p> Signup and view all the answers

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