Rotational mechanics with a photogate | PhysLab

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Rotational mechanics with a photogate

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Student Manual

The purpose of this experiment is to get familiarized with rotational motion. We normally deal with linear motion in our introductory physics class. Rotational motion is only glossed over, leaving holes in our students' understanding. This simple experiment looks at how a torque produces angular acceleration. Moment of inertia determines how much an object can accelerate in response to a torque. Angular acceleration is the change in angular velocity in unit time. How could we measure these quantities? Finally, just as in linear motion, there is the ubiquitous friction which results in loss of energy. What factors determine the amount of friction?

Software Code 1.25software-v2
Sample Results Decay of the angular velocity over time
Full analysis of the bouncing experiment
How energy loss changes with angular speed
Variation of angular velocity with position of masses
Comparing angular velocities for different moments of inertia
Hardware Manual Engineering drawing of the corrugated disk
Engineering drawing of photogate disk – second version
Dimensional drawing of the masses and shaft
Troubleshoot Guide How to run the MATLAB code?
Experiment Code 1.25
Version 2019-v1

Further Readings and References

No references found

Pictorial Procedure

Rotate the shafts with the hand after configuring the Physlogger
The Physlogger screen showing data from the photogate

Attach weights with a thread tied to the axle
Keep the masses furthest apart in this fashion for the bouncing experiment

Lab 1 | Tags: mechanics
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  • Home
  • About Us
    • Overview
    • Centre for Experimental Physics Education (CEPE)
    • Physlab Team
    • Alumni
    • Open Positions
    • Muhammad Sabieh Anwar (Personal)
  • Academics
    • Lab Courses
    • Lab-I (PHY 100/200)
    • Lab-II (PHY 300/500)
    • Ibn Sahl Corner for Optics
    • Smart Physics
    • Single Photon Quantum Mechanics Lab
    • Chasing Cosmic Ray Muons at Physlab
    • Stories
    • Physics Studio
    • Research Stories
    • Class Activities
    • Courses Taught
    • Class Demonstrations
    • PhysDiary
    • Health and Safety
    • Lab Safety
    • Workplace Organization
  • Research
    • Research Themes
    • Research Internships
    • Research Stories
      • International Young Physicists’ Tournament (IYPT) 2019
      • International Young Physicists’ Tournament (IYPT) 2018
      • International Young Physicists’ Tournament (IYPT) 2016
    • Group Meetings
    • Grants
    • Theses and Reports
    • Scientific Publications
    • Invited Talks (Selected)
  • Outreach
    • The Scientific Mind Through the Eyes of a Physics Experimenter
    • National Laboratory Immersion Program
      • First Lahore 2012
      • Second Sukkur 2013
      • Third Lahore 2014
      • Fourth Lahore 2016
    • Labview Workshop 2016
    • Open House
    • Khwarizmi Science Society
    • Helping Pakistan’s Universities
      • National University of Technology (NUTECH) 2019
      • Pakistan Institute of Engineering and Applied Sciences
        (PIEAS) 2019 (Final Phase)
      • Pakistan Institute of Engineering and Applied Sciences
        (PIEAS) 2019 (Phase 2)
      • Pakistan Institute of Engineering and Applied Sciences
        (PIEAS) 2018 (Phase 1)
      • National University of Science & Technology 2016
      • Habib University 2014
      • Preston University 2013
      • Ghulam Ishaque Khan Institute of
        Engineering Sciences and Technology 2011
      • Institute of Space Technology 2010
    • The National STEM School
      • STEM School (2018 – 2019)
      • STEM school (2016 – 2017)
    • Abdus Salam Memorial Lecture Series
  • Facilities
    • Laboratories
    • Equipments
    • Devices & Softwares
      • PhysPlot
      • Physlogger
      • Phystrack
    • Mechanical Workshop
    • Inventory
    • 3D Printed Galleria
    • Forms
    • Equipment Howto’s
  • Media
    • Gallery
    • Visitors
    • Testimonials
  • Contact Us
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