Work, Power, and Energy in Applied Physics-I
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Questions and Answers

What is the definition of work in physics?

  • The dot product of displacement and force (correct)
  • Energy manifested in various forms
  • The area under a force-displacement curve
  • The capacity to do work

    • When does a force do negative work?

  • When the angle between force and displacement is 0°
  • When the angle between force and displacement is 90°
  • When the force is in the same direction as the displacement
  • When the angle between force and displacement is 180° (correct)

    • What are the units of work in the SI system?

  • Newton
  • Joule (correct)
  • Dyne
  • Erg

    • What does the area under a force-displacement curve represent?

    <p>The work done by a varying force</p> Signup and view all the answers

    Which condition results in zero work done by a force?

    <p>Force and displacement are perpendicular (90°)</p> Signup and view all the answers

    Which of the following best defines work?

    <p>Work is done when there is displacement in the direction of the force</p> Signup and view all the answers

    In which scenario is work considered to be negative?

    <p>When the force and displacement are in opposite directions</p> Signup and view all the answers

    What is the importance of a force-displacement curve?

    <p>It provides information about energy transfer</p> Signup and view all the answers

    How is kinetic energy best defined?

    <p>Energy associated with motion</p> Signup and view all the answers

    What does the law of conservation of mechanical energy state?

    <p>The sum of kinetic and potential energy is constant in a closed system</p> Signup and view all the answers

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