# Factors that affect speed

In this lesson we will discuss the effect of frictional forces on speed and how design features can reduce these forces.

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 force acts downwards on an object with mass?

1/8

Q2.Which force slows a parachute down?

2/8

Q3.Which force acts in the same direction as the movement of a car?

3/8

Q4.What is the independent variable?

4/8

Q5.What is the dependent variable?

5/8

Q6.What is the control variable?

6/8

Q7.What was the conclusion to our investigation?

7/8

Q8.Why does the area of the parachute affect the drop time?

8/8

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 force acts downwards on an object with mass?

1/8

Q2.Which force slows a parachute down?

2/8

Q3.Which force acts in the same direction as the movement of a car?

3/8

Q4.What is the independent variable?

4/8

Q5.What is the dependent variable?

5/8

Q6.What is the control variable?

6/8

Q7.What was the conclusion to our investigation?

7/8

Q8.Why does the area of the parachute affect the drop time?

8/8

# 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.

Quiz:

# Factors that affect speed

Don’t worry if you get a question wrong! Forgetting is an important step in learning. We will recap next lesson.

Q1.What is another word for air resistance?

1/8

Q2.Which of these is what we call drag in a specific liquid?

2/8

Q3.There is no air in space. Is there air resistance in space?

3/8

Q4.Why do cyclists crouch down?

4/8

Q5.Which forces are smaller when an object is more streamlined?

Select two (2) boxes

5/8

Q6.Friction is larger when a surface is ...................

6/8

Q7.Friction is smaller when a surface is ...................

7/8

Q8.If the resultant force is zero, what happens to the speed and direction of an object?

8/8

Quiz:

# Factors that affect speed

Don’t worry if you get a question wrong! Forgetting is an important step in learning. We will recap next lesson.

Q1.What is another word for air resistance?

1/8

Q2.Which of these is what we call drag in a specific liquid?

2/8

Q3.There is no air in space. Is there air resistance in space?

3/8

Q4.Why do cyclists crouch down?

4/8

Q5.Which forces are smaller when an object is more streamlined?

Select two (2) boxes

5/8

Q6.Friction is larger when a surface is ...................

6/8

Q7.Friction is smaller when a surface is ...................

7/8

Q8.If the resultant force is zero, what happens to the speed and direction of an object?

8/8

# Lesson summary: Factors that affect speed

## Time to move!

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

For 5 mins...

Move around:
Climb stairs

On the spot:
Dance