Physics of Work Quiz
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Questions and Answers

What is the equation for work done by a constant force?

  • $W = Fd \cos(\theta)$ (correct)
  • $W = Fd$
  • $W = Fd \sin(\theta)$
  • $W = F + d$

    • When does a force do negative work?

  • When it is applied horizontally
  • When it has a component opposite to the direction of the displacement (correct)
  • When it has the same direction as the displacement
  • When it is applied vertically

    • What is the work done by the gravitational force when a ball is thrown upwards?

  • Positive and equal to the weight multiplied by the displacement in the upwards direction
  • Zero
  • Negative and equal to the weight of the ball
  • Negative and equal to the weight multiplied by the displacement in the upwards direction (correct)

    • What happens to the work done by the gravitational force on a ball as it falls towards the ground?

    <p>It is positive and equal to the weight of the ball multiplied by the distance to the ground</p> Signup and view all the answers

    In the work equation $W = Fd \cos(\theta)$, what does $\theta$ represent?

    <p>The angle between the force and the displacement vectors</p> Signup and view all the answers

    What is the work done by a force when it has a component in the direction of the displacement?

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

    In its simplest form, work for a constant force aligned with the direction of motion equals the product of:

    <p>Force strength and distance traveled</p> Signup and view all the answers

    When a force has a component opposite to the direction of the displacement, the work done is:

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

    If a ball is thrown upwards, the work done by the gravitational force is:

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

    The work done by the gravitational force on a ball as it falls is equal to:

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

    When does a force do negative work?

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

    What is the work done by the 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

    In the work equation $W = Fd \cos(\theta)$, what does $\theta$ represent?

    <p>The angle between the force and the displacement vectors</p> Signup and view all the answers

    What happens to the work done by the gravitational force on a ball as it falls towards the ground?

    <p>It is positive</p> Signup and view all the answers

    For a constant force aligned with the direction of motion, the work equals:

    <p>The product of the force strength and the distance traveled</p> Signup and view all the answers

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