Physics Chapter - Potential and Kinetic Energy

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Questions and Answers

What is defined as the energy stored in an object due to work done on it?

  • Thermal Energy
  • Potential Energy (correct)
  • Kinetic Energy
  • Total Energy

Which type of potential energy is associated with an object's height and weight?

  • Elastic Potential Energy
  • Gravitational Potential Energy (correct)
  • Thermal Potential Energy
  • Chemical Potential Energy

What equation represents the potential energy of an object at a height?

  • PE = mgh (correct)
  • PE = mg + h
  • PE = F × s
  • PE = 1/2 mv²

What principle states that energy cannot be created or destroyed?

<p>Law of Conservation of Energy (B)</p> Signup and view all the answers

When a ball falls freely from a height, what happens to its potential energy?

<p>Converts to kinetic energy (C)</p> Signup and view all the answers

What does the law of conservation of energy state?

<p>Energy can be transferred from one form to another. (B)</p> Signup and view all the answers

How is power defined in physics?

<p>The rate of doing work or transferring energy. (D)</p> Signup and view all the answers

What is the formula to calculate average power?

<p>P = Total energy consumed / Total time taken (A)</p> Signup and view all the answers

What is the SI unit of power?

<p>Watt (A)</p> Signup and view all the answers

What does 1 kilowatt-hour (kWh) equate to in Joules?

<p>1 kWh = 3.6 × 10⁶ J (A)</p> Signup and view all the answers

Which factor does NOT affect kinetic energy?

<p>Temperature (A)</p> Signup and view all the answers

What does the work-energy theorem state?

<p>The net work done on a body is equal to its change in kinetic energy. (C)</p> Signup and view all the answers

What does kinetic energy depend on?

<p>The object’s mass and its velocity (A)</p> Signup and view all the answers

Which type of potential energy is associated with an object’s position in a gravitational field?

<p>Gravitational potential energy (D)</p> Signup and view all the answers

Which of the following statements about kinetic energy is true?

<p>Kinetic energy increases with increasing velocity if mass is constant. (D)</p> Signup and view all the answers

What is the SI unit for measuring energy?

<p>Joule (A)</p> Signup and view all the answers

How is kinetic energy (KE) calculated for an object with zero initial velocity?

<p>KE = ½mv² (B)</p> Signup and view all the answers

What is potential energy primarily dependent on?

<p>The mass and position of the object (B)</p> Signup and view all the answers

Which formula represents the relationship between force, mass, and acceleration?

<p>F = ma (C)</p> Signup and view all the answers

If two identical objects are moving with different velocities, which statement is true?

<p>The object with a higher velocity has more kinetic energy. (C)</p> Signup and view all the answers

What is the SI unit of energy?

<p>Joule (C)</p> Signup and view all the answers

Which equation represents the work done by a force?

<p>$W = F imes d$ (D)</p> Signup and view all the answers

What happens to the work done if a force acting on a body causes no displacement?

<p>It is zero. (A)</p> Signup and view all the answers

Mechanical energy is the sum of which two types of energy?

<p>Kinetic energy and potential energy (D)</p> Signup and view all the answers

Which of the following statements about energy is true?

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

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