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Fundamental Forces
Fundamental Forces
Any discussion of forces within the Universe View of science has to start with the four fundamental forces:
Strong Nuclear Force
Weak Nuclear Force
Electromagnetic Force
Gravitational Force
Within our universe, there exists a hierarchy of perception. Most of our experience manifests on the macro level of this system. Theoretic causes of fundamental forces act on the sub-subatomic level.
Super-Macro
Macro
Micro
Atomic
Subatomic
Sub-Subatomic
All forces we perceive on the macro level can be traced back through the hierarchy to fundamental forces. The most common macro level forces are listed below.
All forces we perceive on the macro level can be traced back through the hierarchy to fundamental forces. The most common macro level forces are listed below.
Skeptical Questions In Science
Skeptical Questions In Science
The skeptical question topic for this unit is gravity. Skeptical questions are thoughtful "Why-based" questions which address biases in scientific material. This type of question is not seeking scientific facts.
The article associated with this unit is listed below:
Logger Pro Common Command List
These are the typical commands and processes used when analyzing data with Logger Pro.
Logger Pro Commands.pdfRubber Band Pull Intro Lab
This simple intro lab allows students to work with the two measurement tools for forces - spring scales and load sensors.
We are not actually calculating spring constants in this lab, but the process is useful later in the Work and Power unit of Physics.
Free Body Diagrams
Free Body Diagrams
An ESSENTIAL skill in physics is the ability to draw accurate free body force diagrams. Drawing these diagrams ensures students fully understand a situation BEFORE calculations are attempted.
Force diagrams can range from simple to complex as shown below.
Force Diagrams: Sep 12, 2021 4:01 PM.webmThe video shown is a narration of the Google Slideshow on force diagrams.
Free Body Force Diagram Practice
The following situations, along with those used in class are available to practice free body force diagrams.
Force Diagram Practice.pdfForceDiagrams.pdfFriction and Inclines
Frictional forces and situations involving inclines add another dimension to force diagrams and calculations.
The coefficient of friction is a unitless ratio that compares the frictional force to the normal force for an object and a surface. Typical coefficients of friction are between 0 and 1.
This is where the first 80% Quiz occurs for the unit. This quiz covers fundamental forces, force types, and force diagrams.
This is where the first 80% Quiz occurs for the unit. This quiz covers fundamental forces, force types, and force diagrams.
Newton's Laws of Force and Motion
Newton's Laws of Force and Motion
Newton's Laws are the "rules" that allow us to determine what happens in our free body force diagram. The key law for us in Physics 12 is Newton's 2nd Law:
a = F/m
a = F/m
Newton's 2nd Law Calculations
The calculations associated with Newton's 2nd Law provide the transition from forces to the next unit...MOTION. Although the diagram shown is simplistic, it is a good summary of what occurs when balanced and unbalanced forces are applied on moving and static objects.
Class examples and practice problems with Newton's 2nd Law are shown below.
CRC Elevator Full Lab
CRC Elevator Full Lab
The purpose of this full lab is to use Newton's 2nd Law and force measurement to determine the acceleration of the elevator in the CRC building.
Questions:
"What is the typical acceleration range for the CRC elevator?"
"What factors affect this acceleration range?"
"If-Then-Due-To" Hypothesis
"If a person's apparent weight is measured in a moving elevator, then the elevators acceleration can be determined due to fluctuations in that apparent weight."
Variables: (x) lab groups, (y) elevator acceleration
Constants: elevator and scale used
Controls: internal class control
"Why do most lab groups come out of the elevator with a smile on their faces?"
"Learning-2-Learn" and Retrieval Assignments (Required before taking the unit test!)
Rubber Band Pull Intro Lab Data and Reflection
Practice (Free Body Diagrams, Problem Set Calculations)
80% Quiz #1
80% Quiz #2
Student Study Reflection on the back of the quizzes
Force Calibration Test Answers.pdfCalibration Answers
Calibration Answers
The answers to sections #2 and #3 can vary, so no specific answer is listed. I hope, however, you give me enough information to follow your train of thought. If you have concerns about whether or not your answer is correct, please arrange a time to talk to me before the test!
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