Work and Energy Transfer Quiz

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Questions and Answers

According to the text, work in physics is a scalar quantity. What does this mean?

  • Work is a vector quantity.
  • Work is a scalar quantity. (correct)
  • Work can be positive or negative.
  • Work has magnitude and direction.

What is the formula for calculating work?

  • $W = F \cdot d$ (correct)
  • $W = F \times d$
  • $W = Fd$
  • $W = F/d$

When is work considered zero?

  • When the work formula is not applicable.
  • When the displacement is zero.
  • When the angle between the force and displacement vectors is zero degrees. (correct)
  • When the force is zero.

Which of the following is true about the relationship between the force and displacement vectors in positive work?

<p>The force and displacement vectors are parallel (C)</p> Signup and view all the answers

What is the angle between the force and displacement vectors in negative work?

<p>180 degrees (D)</p> Signup and view all the answers

What is the angle between the force and displacement vectors in zero work?

<p>90 degrees (D)</p> Signup and view all the answers

What is the work done by the chocolate box traveling at 12 m/s with a weight of 0.5 kg?

<p>0 J (B)</p> Signup and view all the answers

Which one of the following is true about work?

<p>All of the above options are true. (D)</p> Signup and view all the answers

Which of the following examples represents positive work?

<p>Kicking a ball in motion. (B)</p> Signup and view all the answers

Which of the following examples represents zero work?

<p>Carrying a box. (A)</p> Signup and view all the answers

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