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Vernier Software and Technology
Vernier Software & Technology

First-Class Levers

Figure from experiment 20 from Physical Science with Vernier

Introduction

A lever is a simple machine used to make work easier. It consists of a long, rigid bar with a support that allows the bar to pivot. The point where the bar pivots is the fulcrum. There are three classes of levers—first, second, and third. We will examine first-class levers in this experiment. Crowbars and scissors are examples of first-class levers. A lever can help you move an object by increasing the force you exert. Mechanical advantage (MA) is a value that tells the number of times a machine increases an applied force. In this experiment, you will study first-class levers using a computer-interfaced Force Sensor to measure resistance force and effort force (in newtons). You will then use this information to calculate the mechanical advantage of each lever.

Objectives

In this experiment, you will

  • Measure force.
  • Calculate actual mechanical advantage (AMA).
  • Calculate ideal mechanical advantage (IMA).
  • Calculate percent difference.
  • Make conclusions about levers.

Sensors and Equipment

This experiment features the following Vernier sensors and equipment.

Option 1

Option 2

Additional Requirements

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

Standards Correlations

See all standards correlations for Physical Science with Vernier »

Experiment 20 from Physical Science with Vernier Lab Book

<em>Physical Science with Vernier</em> book cover

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.

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We will be closed on August 21 to allow our employees to enjoy the Great American Eclipse.