Work–Energy Theorem in Physics

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Questions and Answers

What is the stored energy an object has as a result of its position above Earth’s surface?

  • Mechanical energy
  • Potential energy
  • Gravitational potential energy (correct)
  • Kinetic energy

Which form of energy comes from the motion of an object?

  • Potential energy
  • Kinetic energy (correct)
  • Stored energy
  • Mechanical energy

What is the metric unit of measurement for both work and energy?

  • Newton
  • Volt
  • Joule (correct)
  • Watt

Which formula represents the work–energy theorem?

<p>$W = \Delta KE = \frac{1}{2}mv^2$ (A)</p> Signup and view all the answers

What does the force exerted to lift a rock off the ground equal to?

<p>Its weight, w (A)</p> Signup and view all the answers

Which of the following statements best describes work in the scientific sense?

<p>Applying force to move an object over a distance in the direction of the force (A)</p> Signup and view all the answers

Why is lifting a rock upwards off the ground considered as work?

<p>Because it requires application of force in the direction of motion (C)</p> Signup and view all the answers

Why is carrying a rock in a straight path across the lawn at a constant speed not considered work?

<p>Because no force is applied to keep the rock moving forward at constant velocity (A)</p> Signup and view all the answers

How are work and energy related?

<p>Work changes an object's energy, and energy can be defined as the ability to do work (B)</p> Signup and view all the answers

In what sense can energy be defined?

<p>As the ability to do work (C)</p> Signup and view all the answers

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