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Friction Lab

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Lisa Milazzo

on 27 March 2015

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Transcript of Friction Lab

Deconstructing the prompt
First, bold and underline the verbs.

Next, highlight the vocabulary

Last, make a numbered list of what the prompt is asking you to do.
A background section includes information regarding facts and concepts that you already know or that you research prior to doing the lab.

Each bit of information must be followed by a reference that tells the reader where you got the information.

Read pgs. 352-353 to help you answer the following questions.

Spring Scales
Watch the video to learn how we use spring scales to measure forces.
Experimental Questions
1. How does surface type affect static friction?

2. How does surface type affect kinetic friction?

3. How does mass affect static friction?

4. How does mass affect kinetic friction?

For each experimental question, describe what you think the answer will be.
Friction Lab
8th Grade Science: Unit 4 Forces and Motion
After reading the section “Friction: A Force That Opposes Motion” in your textbook, conduct the following experiment where you investigate the effect that mass and surface type have on the magnitude of both kinetic and static friction.
In this lab there are two concepts and two details.

What are they?

Discuss and record on your whiteboard.

Start with the first concept
What is kinetic friction?

How will you know if there is kinetic friction?

What is the location and direction of kinetic friction?
Now the second concept
What is static friction?

How will you know if there is static friction?

What is the location and direction of static friction?
Now the details
What is mass?

How do we find an object's mass?

What is a surface? Give some examples of different surface types.

How to cite a source
Use the title of the text followed by the pages used.

For example:
(California Physical Science, p.352-353).
How will we measure static and kinetic friction?
Let's talk about it
How does a spring scale work?

What does a spring scale measure?

What units do we use? What letter do we use to represent this measurement?

How do we calibrate or adjust the spring scale?

How do you know if your spring scale needs to be calibrated?

Where on the spring scale do we read the measurement?
Let's Practice!
Scale sizes:
5 N
20 N
50 N

How will I know what spring scale to use?

Note: Before you do the lab, you will need to demonstrate how to use a spring scale.
Based on our experimental questions, what data do we need to collect?
Let's build a data table!
Experimental Design
Variables and Controls
For each experimental question, determine the independent variable, dependent variable, and control.

What will you be doing in this lab?

When will you be collecting data?

When do you measure the static friction?

When do you measure the kinetic friction?
Describe the data and your observations in words for each of the experimental questions.

Clearly state how your data led to any conclusion. Make sure to include the actual data to support your conclusion.
Were your hypotheses supported by the data?
My hypothesis was supported/not supported by the data because....
Repeat for each of your 4 hypotheses

Were there any errors that occurred in the experiment that could have led to problems?

How would you improve or change this experiment to further study static friction and kinetic friction?
Go to
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