Which of the following is true of the conservation of energy in a closed system?

Total energy is always conserved.

Kinetic energy is always conserved.

Potential energy is always conserved.

Mechanical energy is always conserved.

Mechanical energy is not conserved when

gravitational potential energy is converted to kinetic energy.

kinetic energy is converted to gravitational potential energy.

kinetic energy is converted to elastic potential energy.

If mechanical energy is conserved in a system, the energy at any point in time can be in the form of

gravitational potential energy.

Which of the following is evidence that frictional forces are present in a system?

Interactions in the system cause an increase in temperature.

Interactions in the system produce sound.

Mechanical energy is not conserved.

What Do You Know About Mechanical Energy? Trivia Quiz

Approved & Edited by ProProfs Editorial Team

The editorial team at ProProfs Quizzes consists of a select group of subject experts, trivia writers, and quiz masters who have authored over 10,000 quizzes taken by more than 100 million users. This team includes our in-house seasoned quiz moderators and subject matter experts. Our editorial experts, spread across the world, are rigorously trained using our comprehensive guidelines to ensure that you receive the highest quality quizzes.

Learn about Our Editorial Process

| By Sfduke

Sfduke

Community Contributor

Quizzes Created: 51 | Total Attempts: 7,552

Questions: 5 | Attempts: 108 | Updated: Mar 21, 2023

Settings

Create your own Quiz

Share on Facebook Share on Twitter Share on Whatsapp Share on Pinterest Share on Email Copy to Clipboard Embed on your website

Questions and Answers

1.

Which of the following is true of the conservation of energy in a closed system?
- A.
  
  Kinetic energy is always conserved.
- B.
  
  Potential energy is always conserved.
- C.
  
  Mechanical energy is always conserved.
- D.
  
  Total energy is always conserved.
Correct Answer
D. Total energy is always conserved.

Explanation
The conservation of energy in a closed system means that the total energy within the system remains constant. This means that energy cannot be created or destroyed, only transferred or transformed from one form to another. Kinetic energy and potential energy can both be converted into other forms of energy, such as thermal or electrical energy, but the total amount of energy in the system remains the same. Therefore, the statement that total energy is always conserved is correct.

Rate this question:
2.

Mechanical energy is not conserved when
- A.
  
  Gravitational potential energy is converted to kinetic energy.
- B.
  
  Kinetic energy is converted to gravitational potential energy.
- C.
  
  Kinetic energy is converted to elastic potential energy.
- D.
  
  Friction is not negligible.
Correct Answer
D. Friction is not negligible.

Explanation
When friction is not negligible, mechanical energy is not conserved. Friction is a force that opposes motion and causes energy to be converted into other forms, such as heat and sound. This conversion of energy leads to a decrease in the total mechanical energy of a system. Therefore, when friction is present and significant, mechanical energy is not conserved.

Rate this question:
3.

If mechanical energy is conserved in a system, the energy at any point in time can be in the form of
- A.
  
  Kinetic energy.
- B.
  
  Gravitational potential energy.
- C.
  
  Elastic potential energy.
- D.
  
  All of the above
Correct Answer
D. All of the above

Explanation
If mechanical energy is conserved in a system, it means that the total energy of the system remains constant over time. This conservation allows for the energy to be converted between different forms. In this case, the energy at any point in time can be in the form of kinetic energy, which is the energy of motion. It can also be in the form of gravitational potential energy, which is the energy associated with an object's position in a gravitational field. Lastly, it can be in the form of elastic potential energy, which is the energy stored in a stretched or compressed object. Therefore, all of the above options are correct.

Rate this question:
4.

Which of the following is not a form of mechanical energy?
- A.
  
  Kinetic energy
- B.
  
  Chemical potential energy
- C.
  
  Gravitational potential energy
- D.
  
  Elastic potential energy
Correct Answer
B. Chemical potential energy

Explanation
Chemical potential energy is not a form of mechanical energy because it is associated with the potential energy stored in the chemical bonds of a substance. Mechanical energy, on the other hand, is the energy possessed by an object due to its motion or position. Kinetic energy is the energy of motion, gravitational potential energy is the energy stored in an object due to its height above the ground, and elastic potential energy is the energy stored in a stretched or compressed object.

Rate this question:
5.

Which of the following is evidence that frictional forces are present in a system?
- A.
  
  Interactions in the system cause an increase in temperature.
- B.
  
  Interactions in the system produce sound.
- C.
  
  Mechanical energy is not conserved.
- D.
  
  All of the above
Correct Answer
D. All of the above

Explanation
The correct answer is "all of the above". This is because an increase in temperature is a result of frictional forces converting mechanical energy into thermal energy. The production of sound is also evidence of frictional forces as it is caused by the vibrations and interactions between surfaces. Lastly, the fact that mechanical energy is not conserved indicates the presence of frictional forces, as they can cause energy to be lost or converted into other forms.

Rate this question:

Quiz Review Timeline +

Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.

Current Version
Mar 21, 2023

Quiz Edited by
ProProfs Editorial Team
Jan 06, 2015

Quiz Created by
Sfduke

What Do You Know About Mechanical Energy? Trivia Quiz

Which of the following is true of the conservation of energy in a closed system?

Mechanical energy is not conserved when

If mechanical energy is conserved in a system, the energy at any point in time can be in the form of

Which of the following is not a form of mechanical energy?

Which of the following is evidence that frictional forces are present in a system?