Skip to main content

AP/College

Damped Simple Harmonic Motion

Profile picture for user Rich
Submitted by Rich on Sun, 07/07/2019 - 19:47

Introduction

Damping causes oscillatory systems to dissipate energy to their surroundings.  Frictional losses are quite common in mechanical systems and result in damped simple harmonic motion.  For example, when a child stops pumping a swing, the amplitude of the oscillations gradually decay toward zero.  The same thing happens to a mass that hangs from an oscillating spring.  It is quite common for the amplitude of such oscillations to exhibit a behavior that is negative exp

Subject
Grade Level

How much Carbon Dioxide do you Produce? (MS-ESS3-4 )

Profile picture for user Danny
Submitted by Danny on Fri, 07/05/2019 - 00:59

It is almost instinctive when you first get the PocketLab Air to breathe directly on it just to see what happens. As seen below, of the PocketLab Air's seven sensors five of them detect changes from a direct human breath. These parameters are carbon dioxide, particulate matter, temperature, humidity, and pressure. The most interesting of these is the sharp rise in carbon dioxide which as the most important greenhouse gas brings about strong connections to the topic of climate change.

PocketLab University - Principles of Temperature Sensors

Profile picture for user clifton
Submitted by clifton on Thu, 06/20/2019 - 20:41

PocketLab University

PocketLab University is an initiative to develop college-level labs that students can conduct at home, in their dorm room, or in any other setting without the need for laboratory equipment. Lab 1 uses PocketLab Voyager to understand the physical principles that enable temperature sensors to convert the physical property of temperature to an electrical property that we can measure with simple circuitry. The student assignment is below.

Grade Level

Periodic Motion: Weights vs. Springs

Profile picture for user Rich
Submitted by Rich on Thu, 06/13/2019 - 16:54

Introduction

In a well-known 1938 book entitled "Demonstration Experiments in Physics", editor Richard Sutton describes a setup for producing periodic motion of a cart using weights instead of springs.  With today's technology this experiment can be done using an air disk, and data can be collected with PocketLab Voyager's rangefinder.  The data clearly shows that not all periodic motions are simple harmonic.  The restoring force when weights are used is constant, while the restoring force with springs is proportional to the displacement.  Springs produce simple harmonic

Subject
Grade Level

Physics Galore with the PocketLab Swing

Profile picture for user Rich
Submitted by Rich on Mon, 05/20/2019 - 16:00

The PocketLab Voyager Swing

The PocketLab Voyager swing, 3D printable from the accompanying .STL file, offers your physics students a way to study a plethora of physics concepts in a single experiment. Figure 1 shows a closeup up the swing, approximately inches tall, inches wide, and inches deep.

Subject
Grade Level

Air Quality Lesson Plans

Profile picture for user DaveBakker
Submitted by DaveBakker on Fri, 05/03/2019 - 21:44

Free Air Quality Lesson Plans

Bring the science of air quality into your classroom through hands-on activities, inquiry-based lessons and real science tools. These high quality lessons plans are free to download and were developed by King's University in conjunction with Telus World of Science in Edmonton.

Subject

Convert the PocketLab HotRod to an Inertia Cart

Profile picture for user Rich
Submitted by Rich on Thu, 04/25/2019 - 17:37

The PocketLab Inertia Cart

This cool inertia cart dates back to the early 1900's, but hasn't seen much action since, primarily due to a lack of ease in construction.  However, now with the PocketLab HotRod and three 3D printable parts whose .STL files are included with this lesson, you can use this demonstration in your classroom.  Depending upon the grade level of your students, you can customize the discussion as appropriate.  Concepts involved include Newton's Laws of Motion, pulleys, force, acceleration, Half-Atwood machine, inertia, and moment of inertia.

Subject
Grade Level

Moment of Inertia / Mass Contrasted

Profile picture for user Rich
Submitted by Rich on Mon, 04/22/2019 - 15:32

Introduction to Moment of Inertia

There are numerous analogies when comparing linear and rotational motion.  At the heart of these comparisons lie the concepts of mass on one hand and moment of inertia on the other.  In addition to being a property of any physical object, mass is a measure of the resistance of an object to acceleration when a net force has been applied to the object.  Newton's Second Law of Motion expresses this in the fa

Subject
Grade Level

The "Speeder Upper" - Translational and Rotational Motion Study

Profile picture for user Rich
Submitted by Rich on Wed, 04/17/2019 - 19:08

What's a "Speeder Upper"?

As shown in Figure 1, a "Speeder Upper" is a pair of disks that are connected by a short rod of much smaller radius.  The NSTA science ruler gives you a feel for the dimensions of the Speeder Upper.  The disks are 0.5" thick and 2.5" in diameter and are connected by a short 5/16" diameter wood dowel rod.  The 3D printer stl file for the disks is provided with this lesson in the event that you want to make a Speeder Upper for use in your physics classroom.

Subject
Grade Level