Lab: Paper Airplanes Worksheet Page 3

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Lab: Science Friction
Part 1: Types of Friction - Which of the 3 types of friction, static, sliding, and rolling, is the
largest force and which is the smallest force?
Pre-Lab: Define the 3 types of friction (page 121).
Static: _____________________________________________________________________________________
Sliding: ____________________________________________________________________________________
Rolling: ____________________________________________________________________________________
Form a Hypothesis
Which type of friction is the largest, or causes the most friction? ______________ Explain
_____________________________________________________________________________________________
Which type of friction is the smallest, or causes the least friction? ______________ Explain
_____________________________________________________________________________________________
Procedures
1. Calibrate the spring scale by setting it to 0. To do
this, pull the metal tab at the top of the scale.
2. Cut a piece of string, and tie it in a loop that fits in
the textbook, as shown. Hook the string to the
spring scale.
3. Practice the next three steps several times before you
collect data.
4. To measure the static friction between the book and the
Type of Friction
Force (
)
table, pull the spring scale very slowly. Record the largest
force on the scale before the book starts to move.
Static
5. After the book begins to move, you can determine the
Sliding
sliding friction. Record the force required to keep the
book sliding at a slow, constant speed.
Rolling
6. To calculate the rolling friction, place two or three markers
under the book to act as rollers. Make sure the rollers are
evenly spaced. Place another roller in front of the
book so that the book will roll onto it. Pull the spring
scale slowly. Measure the force needed to keep the
book rolling at a constant speed.
Analysis
1. Which type of friction was the largest? ______________
2. Which type of friction was the smallest? _______________
3. Do the results support your hypothesis? Explain why or why not & provide a possible
explanation for why you obtained the given results.

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