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| A standard tabletop ballistic pendulum which consists of a ball baring launched from a spring-loaded launcher into a bifilar-suspended catcher shows the conservation of energy. | A safer variation on the standard ballistic pendulum consists of a ball baring launched from a spring-loaded launcher into a bifilar-suspended catcher showing the conservation of energy. |
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| 1. Using the part specifications below, and a careful measurement of the | 1. Using the part specifications below, and a careful measurement of the angular displacement, one can calculate the energy dissipated into the catcher. (Verification of the conservation of energy to come - measurement of the spring constant needed!) |
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| The catcher and the ball baring have a mass of 314.8 g and 57.3 g respectively. | The catcher and the ball baring have a mass of 314.8 g and 57.3 g respectively. On average, an angular displacement of about 21° is observed. An estimate of the initial kinetic (total) energy of the ball baring can be obtained if the initial velocity is known (soon to come - analyzing slow motion footage). |
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| * List any references | * [https://en.wikipedia.org/wiki/Conservation_of_energy Conservation of Energy - Wikipedia] * [https://en.wikipedia.org/wiki/Ballistic_pendulum Classic Ballistic Pendulum - Wikipedia] |
[:PiraScheme#Mechanics: Table of Mechanics Demonstration] |
[:MEEquipmentList: List of Mechanics Equipment & Supplies] |
[:Demonstrations:Lecture Demonstrations] |
Ballistic Pendulum, 1M40.40
Topic and Concept:
Work and Energy, [:WorkEnergy#ConservationOfEnergy: 1M40. Conservation of Energy]
Location:
Cabinet: [:MechanicsCabinet:Mechanic (ME)]
Bay: [:MechanicsCabinetBayB10:(B10)]
Shelf: #1 attachment: mainPhoto
Abstract:
A safer variation on the standard ballistic pendulum consists of a ball baring launched from a spring-loaded launcher into a bifilar-suspended catcher showing the conservation of energy.
Equipment |
Location |
ID Number |
|
|
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Ballistic Pendulum Apparatus |
ME, Bay B10, Shelf #1 |
|
Important Setup Notes:
- N/A
Setup and Procedure:
- After placing the apparatus on the bench top, use the three set screws and mass suspended over the protractor (see photos) to level it.
- There is hole in the ball baring. Place the baring on the launcher by putting the launching rod through this hole.
- Cock the firing mechanism by pushing on the baring horizontally, opposite to the catcher.
- There is a release lever situated on the top of the housing of the launcher. When ready to launch the baring, push downward on this lever.
- Using the part specifications below, and a careful measurement of the angular displacement, one can calculate the energy dissipated into the catcher. (Verification of the conservation of energy to come - measurement of the spring constant needed!)
Cautions, Warnings, or Safety Concerns:
- N/A
Discussion: The catcher and the ball baring have a mass of 314.8 g and 57.3 g respectively. On average, an angular displacement of about 21° is observed. An estimate of the initial kinetic (total) energy of the ball baring can be obtained if the initial velocity is known (soon to come - analyzing slow motion footage).
attachment: photo |
attachment: photo |
attachment: photo |
attachment: photo |
Videos:
[https://www.youtube.com/user/LectureDemostrations/videos?view=1 Lecture Demonstration's Youtube Channel]
References:
[https://en.wikipedia.org/wiki/Conservation_of_energy Conservation of Energy - Wikipedia]
[https://en.wikipedia.org/wiki/Ballistic_pendulum Classic Ballistic Pendulum - Wikipedia]
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