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Newton's Second Law of Motion and Fluid Mechanics: A Comprehensive Guide
This guide covers key concepts in physics, including Newton's 2nd law of motion, forces, free body diagrams, motion in fluids, moments, and pressure. It provides detailed explanations, examples, and practical investigations to help students understand these fundamental principles.
1/5/2023
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This page covers free body diagrams and provides examples of force analysis in various scenarios.
Key concepts:
Highlight: When drawing free body diagrams, always use arrows to scale and a dot to represent the object.
Example: In the helicopter example, when the load experiences acceleration, the tension in the cable increases from 981N to 1081N.
This page describes a practical investigation of motion in fluid and introduces forces on a slope.
Key points:
Vocabulary: Terminal velocity is the constant speed reached by an object falling through a fluid when the drag force equals the gravitational force.
Definition: The center of gravity is the point at which the entire weight of an object seems to act.
This page introduces the concept of moments and provides examples of force analysis using trigonometry.
Key points:
Definition: A moment is the turning effect of a force, calculated as the product of the force and the perpendicular distance from the pivot to the line of action of the force.
Example: For a force of 6N applied 0.1m from a pivot, the moment is 0.5 Nm.
This page explains the principle of moments and introduces force couples and torques.
Key concepts:
Definition: The principle of moments states that for an object in equilibrium, the sum of clockwise moments equals the sum of anticlockwise moments.
Vocabulary: A force couple consists of two equal and opposite forces acting in the same plane, creating a pure rotational effect.
This page covers pressure in fluids and introduces Archimedes' Principle.
Key points:
Definition: Archimedes' Principle states that the upthrust acting on a body submerged in a liquid is equal to the weight of the liquid that has been displaced.
Formula: Pressure in a fluid is given by P = ρgh, where ρ is density, g is gravitational acceleration, and h is depth.
This page provides practice questions on moments and their solutions.
Key points:
Example: For a force of 5N applied at a 30° angle to a 0.2m lever arm, the moment is calculated as 5 × 0.1 = 0.5 Nm.
Highlight: When solving moment problems, always identify the perpendicular distance from the pivot to the line of action of the force.
This page continues with more practice problems on moments and their detailed solutions.
Key points:
Example: In a balanced beam problem, the unknown weight is calculated to be 164 N, corresponding to a mass of 16.7 kg.
Highlight: When solving equilibrium problems, always equate the sum of clockwise moments to the sum of anticlockwise moments.
This page introduces Newton's second law of motion, which states that the net force acting on an object is equal to its mass multiplied by its acceleration (F = ma).
Key points:
Definition: Newton's second law of motion states that F = ma, where F is the net force, m is mass, and a is acceleration.
Example: For a constant mass, if two forces of 2N upward and 1N downward are applied, the net force is 1N upward.
Vocabulary: Normal force is the force exerted by a surface on an object in contact with it, always perpendicular to the surface.
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Emma Corden
@emmacorden_rpll
·
29 Followers
Follow
Newton's Second Law of Motion and Fluid Mechanics: A Comprehensive Guide
This guide covers key concepts in physics, including Newton's 2nd law of motion, forces, free body diagrams, motion in fluids, moments, and pressure. It provides detailed explanations, examples, and practical investigations to help students understand these fundamental principles.
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Improve your grades
Join milions of students
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This page covers free body diagrams and provides examples of force analysis in various scenarios.
Key concepts:
Highlight: When drawing free body diagrams, always use arrows to scale and a dot to represent the object.
Example: In the helicopter example, when the load experiences acceleration, the tension in the cable increases from 981N to 1081N.
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
This page describes a practical investigation of motion in fluid and introduces forces on a slope.
Key points:
Vocabulary: Terminal velocity is the constant speed reached by an object falling through a fluid when the drag force equals the gravitational force.
Definition: The center of gravity is the point at which the entire weight of an object seems to act.
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
This page introduces the concept of moments and provides examples of force analysis using trigonometry.
Key points:
Definition: A moment is the turning effect of a force, calculated as the product of the force and the perpendicular distance from the pivot to the line of action of the force.
Example: For a force of 6N applied 0.1m from a pivot, the moment is 0.5 Nm.
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Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
This page explains the principle of moments and introduces force couples and torques.
Key concepts:
Definition: The principle of moments states that for an object in equilibrium, the sum of clockwise moments equals the sum of anticlockwise moments.
Vocabulary: A force couple consists of two equal and opposite forces acting in the same plane, creating a pure rotational effect.
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Join milions of students
By signing up you accept Terms of Service and Privacy Policy
This page covers pressure in fluids and introduces Archimedes' Principle.
Key points:
Definition: Archimedes' Principle states that the upthrust acting on a body submerged in a liquid is equal to the weight of the liquid that has been displaced.
Formula: Pressure in a fluid is given by P = ρgh, where ρ is density, g is gravitational acceleration, and h is depth.
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Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
This page provides practice questions on moments and their solutions.
Key points:
Example: For a force of 5N applied at a 30° angle to a 0.2m lever arm, the moment is calculated as 5 × 0.1 = 0.5 Nm.
Highlight: When solving moment problems, always identify the perpendicular distance from the pivot to the line of action of the force.
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Join milions of students
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This page continues with more practice problems on moments and their detailed solutions.
Key points:
Example: In a balanced beam problem, the unknown weight is calculated to be 164 N, corresponding to a mass of 16.7 kg.
Highlight: When solving equilibrium problems, always equate the sum of clockwise moments to the sum of anticlockwise moments.
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
This page introduces Newton's second law of motion, which states that the net force acting on an object is equal to its mass multiplied by its acceleration (F = ma).
Key points:
Definition: Newton's second law of motion states that F = ma, where F is the net force, m is mass, and a is acceleration.
Example: For a constant mass, if two forces of 2N upward and 1N downward are applied, the net force is 1N upward.
Vocabulary: Normal force is the force exerted by a surface on an object in contact with it, always perpendicular to the surface.
Average App Rating
Students use Knowunity
In Education App Charts in 12 Countries
Students uploaded study notes
iOS User
Stefan S, iOS User
SuSSan, iOS User
