Work and Energy in Physics
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Questions and Answers

What is work in the context of physics?

  • The energy transferred to or from an object via the application of force along a displacement (correct)
  • The distance traveled by an object
  • The force applied to an object
  • The weight of an object

    • When does a force do positive work?

  • When it has a component in the direction of the displacement of the point of application (correct)
  • When it is applied horizontally
  • When it has a component opposite to the direction of the displacement at the point of application
  • When it is applied vertically

    • What mathematical operation gives the work done when both force and displacement are constant?

  • The dot product of force and displacement vectors (correct)
  • The multiplication of force and displacement magnitudes
  • The cross product of force and displacement vectors
  • The addition of force and displacement magnitudes

    • In what scenario does a force do negative work?

    <p>If it has a component opposite to the direction of the displacement at the point of application</p> Signup and view all the answers

    How is the work done by a gravitational force when a ball is held above the ground and then dropped?

    <p>Positive, equal to the weight of the ball multiplied by the distance to the ground</p> Signup and view all the answers

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