# Tagged With "VelocityLab"

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#### Re: A Velocity Lab Experiment on Rolling Resistance

Robby ·
Thanks again for the great lesson, Rich!
Blog Post

#### A Velocity Lab Experiment on Rolling Resistance

Rich ·
Rolling resistance is a force that opposes the motion when an object rolls along a surface. In this experiment a coasting cylinder on a carpet gradually slows down and stops due to rolling resistance. The primary factor affecting rolling resistance here is deformation of the carpet as the cylinder rolls. Not all of the energy needed to deform the carpet is recovered when the pressure from the cylinder is removed. In other words, the effect is non-elastic. The purpose of this experiment is...
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#### VelocityLab Investigation of Damped Harmonic Motion

Rich ·
This investigation shows how VelocityLab allows for a quick and easy demonstration of damped harmonic motion. The photo below shows the experiment setup as performed by the author. A jellied cranberry sauce can was selected as there is virtually no sloshing of the cranberry sauce as the can oscillates back-and-forth on a curved piece of laminate flooring. The center of the flooring is clamped down to the table with an adjustable wrench. The ends of the laminate flooring are raised a little...
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#### Re: VelocityLab Investigation of Damped Harmonic Motion

Robby ·
Another great lesson, Rich! Thanks for contributing.
Blog Post

#### A Momentum Conservation Experiment for an Inelastic Collision Between Two Carts

Rich ·
Do you have two PocketLab Maker Kit carts, and do you have the free VelocityLab app? Then you are all set to do some experiments in conservation of momentum with PocketLab! This lab discusses how to setup and perform an inelastic collision in which one cart (A) is moving toward another cart (B) that is at rest. When cart A hits cart B, they stick and move off together. The photo below shows the two carts shortly before the collision would occur. PocketLab is mounted on a front wheel of cart...
Blog Post

#### A Classic Conservation of Momentum Experiment with PocketLab

Rich ·
A well-known conservation of momentum experiment that has been around for many years involves dropping a brick onto a horizontally moving cart. With PocketLab and the VelocityLab app, your students can perform this experiment easily with the cart from the PocketLab Maker Kit and a small block of wood. The snapshot below shows the setup with the author about to drop the block of wood onto the cart coming from the left. A pair of rails, with inside separation just a little larger than the axle...
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#### A Quantitative PocketLab Study of Momentum, Impulse, and Force in the Collision of Two Carts

Rich ·
You don't need an expensive air track to do a quantitative study of momentum, impulse, and force involved in the collision of two carts. You can get very good results by the use of two PocketLabs, two iPhones, and a pair of carts from the PocketLab Maker Kit. As shown in the picture below, each cart has a PocketLab mounted on one of its wheels, so that the z-axis is the axis of interest when the carts are moving. You can only connect one PocketLab to an iPhone at time, thus the need for two...
Blog Post

#### Conservation of Momentum When Two Carts "Explode"

Rich ·
Do you have two carts from the PocketLab Maker Kits? Do you have two PocketLabs? You probably have at least two students in your physics class with iPhones. Do they have the VelocityLap app installed on their iPhones? Then you have the major components for your students to investigate conservation of momentum when two carts on a track "explode". As shown in the picture below, each cart has a PocketLab mounted on one of its wheels, so that the z-axis is the axis of interest when the carts are...
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