Vernier Software & Technology

# What a Drag!

## Introduction

Why do you have to wear tennis shoes to your physical education class? Have you ever worn slippery-soled dress shoes? In this lab, you will observe the differences between the slickness of the bottom of different shoes. When the shoes are dragged across a surface, a frictional force opposes the motion. If the bottom of shoe is slick, you will need less force to pull it across the table because there is less friction. The opposite is also true— if the bottom of the shoe is very sticky, or bumpy, you will need a bigger force to pull it, because it creates a larger frictional force.

## Objectives

In this activity, you will

• Make observations and predictions about shoes.
• Measure the force needed to pull different shoes across a surface.

## Sensors and Equipment

This experiment features the following Vernier sensors and equipment.

### Option 2

You may also need an interface and software for data collection. What do I need for data collection?

## Elementary Science with Vernier

See other experiments from the lab book.

 1 Learning to Use Go!Temp 2 How Do Mittens Keep You Warm? 3 Baggie Mittens 4 The Sole Purpose 5 Cool Reaction! 6 Cold as Ice 7 Are We Cool or What? 8 Why Do We Need Thermometers? 9 Celsius or Fahrenheit. What's the Difference? 10 Getting it Just Right! 11 The Temperature Probe Spends the Night 12 Hold Everything! Comparing Insulators 13 Keepin' it Cool! Design Your Own Thermos 14 I'm Melting! Water Changes States 15 Solid, Liquid, Gas: Water Can Do it All! 16 Learning to Use the Pressure Sensor 17 Get a Grip! 18 Under Pressure 19 Bubbles in Your Bread 20 Learning to Use Go! Motion 21 e-Motion 22 Batty About Science 23 Spring into Action! 24 Air Ball! 25 Driving with Energy 26 Weigh Station - All Trucks Stop! 27 Learning to Use the Force Sensor 28 Lift the Load 29 What a Drag! 30 Oh! My Aching Back! How Ramps Make Lifting Easier 31 Learning to Use the Light Probe 32 Distance From the Sun 33 Summer and Winter 34 Sunshine on My Shoulders 35 Reflectivity of Light 36 Learning to Use the Magnetic Field Sensor 37 Exploring the Poles 38 Making Magnets 39 Electromagnets 40 Learning to Use the Voltage Probe 41 Are All Batteries the Same? 42 Stacked Batteries 43 All Worn Out! P1 Weather Stations

### Experiment 29 from Elementary Science with Vernier Lab Book

#### Included in the Lab Book

Vernier lab books include word-processing files of the student instructions, essential teacher information, suggested answers, sample data and graphs, and more.