Vernier Software and Technology
Vernier Software & Technology

Pulleys

Figure from experiment 31 from Middle School Science with Vernier

Introduction

A pulley is a simple machine having a rope that passes over a grooved wheel. A fixed pulley is attached to a solid support and changes the direction of force. The resistance force is the weight of the object being lifted. This force is applied to one end of the rope that goes over a fixed pulley. The effort force is exerted on the other end of the rope, in opposition to the resistance force.

A movable pulley moves along the rope with the resistance force, and the direction of the force is not changed. A pulley system may have a single pulley or a combination of pulleys. Pulleys are used to make work easier.

Objectives

In this experiment, you will

  • Use a Force Sensor to measure force.
  • Calculate actual mechanical advantage and ideal mechanical advantage.
  • Determine efficiency.
  • Make conclusions about pulley systems.

Sensors and Equipment

This experiment features the following Vernier sensors and equipment.

Option 1

Option 2

Option 3

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 Middle School Science with Vernier »

Experiment 31 from Middle School Science with Vernier Lab Book

<em>Middle School 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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