Conservation of energy

In this lesson we will be studying the law of conservation of energy with a focus on conservation of energy during transfers between the kinetic store and gravitational potential energy store.

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

Quiz:

Intro quiz - Recap from previous lesson

Before we start this lesson, let’s see what you can remember from this topic. Here’s a quick quiz!

Question 1

Question 2

Question 3

Question 4

Question 5

Question 6

Q1.Revision: Which energy store is increased when an object is stretched?

1/6

Q2.What is the definition of the gravitational potential energy store?

2/6

Q3.Which is the correct equation linking gravitational field strength, gravitational potential energy, height and mass

3/6

Q4.What effect would doubling the mass of an object have on its store of GPE?

4/6

Q5.What is the value of the GPE store for a 10 kg object held 50 m above the surface of the Earth (assume g = 10 N/kg)?

5/6

Q6.How can a 500 kg object have the same value for its GPE store on the Moon as it does on the Earth?

6/6

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

Quiz:

Intro quiz - Recap from previous lesson

Before we start this lesson, let’s see what you can remember from this topic. Here’s a quick quiz!

Question 1

Question 2

Question 3

Question 4

Question 5

Question 6

Q1.Revision: Which energy store is increased when an object is stretched?

1/6

Q2.What is the definition of the gravitational potential energy store?

2/6

Q3.Which is the correct equation linking gravitational field strength, gravitational potential energy, height and mass

3/6

Q4.What effect would doubling the mass of an object have on its store of GPE?

4/6

Q5.What is the value of the GPE store for a 10 kg object held 50 m above the surface of the Earth (assume g = 10 N/kg)?

5/6

Q6.How can a 500 kg object have the same value for its GPE store on the Moon as it does on the Earth?

6/6

Video

Click on the play button to start the video. If your teacher asks you to pause the video and look at the worksheet you should:

  • Click "Close Video"
  • Click "Next" to view the activity

Your video will re-appear on the next page, and will stay paused in the right place.

Worksheet

These slides will take you through some tasks for the lesson. If you need to re-play the video, click the ‘Resume Video’ icon. If you are asked to add answers to the slides, first download or print out the worksheet. Once you have finished all the tasks, click ‘Next’ below.

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

Quiz:

Conservation of energy

This quiz will test your understanding of the content from this lesson and earlier lessons in the topic

Question 1

Question 2

Question 3

Question 4

Question 5

Question 6

Q1.Which is the correct statement about closed systems?

1/6

Q2.Revision: A box is pushed along the ground. Which energy transfer is involved?

2/6

Q3.Revision: What is the definition of the gravitational potential energy store?

3/6

Q4.A ball dropped from a cliff has 100 J in its GPE store as it is released. What is the value of the KE store when it just reaches the ground?

4/6

Q5.A ball dropped from a cliff has 100 J in its GPE store as it is released. What is the value of the KE store when it is half way to the ground?

5/6

Q6.What is the maximum height reached for an object of mass 1 kg launched upwards at a speed of 20 m/s (g = 10 N/kg)

6/6

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

Quiz:

Conservation of energy

This quiz will test your understanding of the content from this lesson and earlier lessons in the topic

Question 1

Question 2

Question 3

Question 4

Question 5

Question 6

Q1.Which is the correct statement about closed systems?

1/6

Q2.Revision: A box is pushed along the ground. Which energy transfer is involved?

2/6

Q3.Revision: What is the definition of the gravitational potential energy store?

3/6

Q4.A ball dropped from a cliff has 100 J in its GPE store as it is released. What is the value of the KE store when it just reaches the ground?

4/6

Q5.A ball dropped from a cliff has 100 J in its GPE store as it is released. What is the value of the KE store when it is half way to the ground?

5/6

Q6.What is the maximum height reached for an object of mass 1 kg launched upwards at a speed of 20 m/s (g = 10 N/kg)

6/6

Lesson summary: Conservation of energy

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