# Power

In this lesson we will be looking at what defines the power of an object, and how to calculate power.

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!

Q1.Which is the correct statement about closed systems?

1/6

Q2.Which factors will affect the elastic potential energy store? (select two)

Select two (2) boxes

2/6

Q3.If the extension of a spring is doubled, what effect will this have on the elastic potential energy stored?

3/6

Q4.What is the elastic potential of an object with spring constant k = 10 N/m that has an extension of 0.5 m

4/6

Q5.A bungee jumper starts with 500 J in their GPE store. After they jump they fall and are brought to a stop with the bungee cord. With the cord fully stretched what is the energy in the EPE store?

5/6

Q6.HT only: What is the spring constant of a spring that stores 50 J of energy when extended by 10 cm

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!

Q1.Which is the correct statement about closed systems?

1/6

Q2.Which factors will affect the elastic potential energy store? (select two)

Select two (2) boxes

2/6

Q3.If the extension of a spring is doubled, what effect will this have on the elastic potential energy stored?

3/6

Q4.What is the elastic potential of an object with spring constant k = 10 N/m that has an extension of 0.5 m

4/6

Q5.A bungee jumper starts with 500 J in their GPE store. After they jump they fall and are brought to a stop with the bungee cord. With the cord fully stretched what is the energy in the EPE store?

5/6

Q6.HT only: What is the spring constant of a spring that stores 50 J of energy when extended by 10 cm

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:

# Power

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

Q1.Which of these is the correct definition of power?

1/5

Q2.Which is the correct statement about closed systems?

2/5

Q3.What is the power of a motor that transfers 450 J of energy in 9 s?

3/5

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?

4/5

Q5.How long would it take a 400 W motor to transfer 2000 J of energy?

5/5

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:

# Power

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

Q1.Which of these is the correct definition of power?

1/5

Q2.Which is the correct statement about closed systems?

2/5

Q3.What is the power of a motor that transfers 450 J of energy in 9 s?

3/5

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?

4/5

Q5.How long would it take a 400 W motor to transfer 2000 J of energy?

5/5

# Lesson summary: Power

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To share your results with your teacher please complete one of the quizzes.

## Time to move!

Did you know that exercise helps your concentration and ability to learn?

For 5 mins...

Move around:
Walk

On the spot:
Dance