AP Physics C: Mechanics

Slides:



Advertisements
Similar presentations
Physics: Principles with Applications, 6th edition
Advertisements

Dynamics Dynamics Work/ Kinetic Energy Potential Energy
Chapter 4 Work and Energy Additional Concepts For Describing Motion.
Energy and Energy Transfer
Chapter 5 Energy. Forms of Energy Mechanical Mechanical focus for now focus for now chemical chemical electromagnetic electromagnetic nuclear nuclear.
Chapter 5 Energy. Forms of Energy Mechanical Focus for now May be kinetic (associated with motion) or potential (associated with position) Chemical Electromagnetic.
King Fahd University of Petroleum & Minerals Mechanical Engineering Dynamics ME 201 BY Dr. Meyassar N. Al-Haddad Lecture # 16.
King Fahd University of Petroleum & Minerals Mechanical Engineering Dynamics ME 201 BY Dr. Meyassar N. Al-Haddad Lecture # 16.
Chapter 7 Kinetic energy and work Key contents Work and kinetic energy Work done by gravity, springs and a variable force Power.
Potential Energy and Conservation of Energy Chapter 8 Copyright © 2014 John Wiley & Sons, Inc. All rights reserved.
AP PHYSICS REVIEW Energy. Work  Work is when a force is applied to an object to move it a distance.  W = Fd cos( Ɵ )  Work can be done by many forces.
Work, energy and power You should be able to: state the definition of work done by a constant force; understand the work done by a varying force; state.
Energy 12/11/14. Chapter 6 – Work and Energy Major Concepts: Work Power Conservative and Non-Conservative Forces Mechanical and Non-Mechanical Energies.
Student of the Week. Questions From Reading Activity?
Chapter 6 Work and Energy.
Work and Energy Work done by a constant force Work-Energy Theorem and KE Gravitational Potential Energy Conservative Forces vs Non- conservative Forces.
Chapter 6 Work, Energy, Power Work  The work done by force is defined as the product of that force times the parallel distance over which it acts. 
ENERGY Different forms; Chemical, Electrical, Heat, Electromagnetic, Nuclear and Mechanical Energy can be transformed from one type to another but the.
Work, Energy, Power. Work  The work done by force is defined as the product of that force times the parallel distance over which it acts.  The unit.
Problem Solving Using Conservation of Mechanical Energy
Chapter 6 Energy and Energy Transfer. Introduction to Energy The concept of energy is one of the most important topics in science Every physical process.
Chapter 6 Work and Energy.
Ch 6 Work and Energy.
UNIT 5 WORK AND ENERGY FÍSICA 1 BATXILLERAT. Work (I) The work (W) done by a force that acts on a body in motion is the product of the force in the direction.
Chapter 5 Energy. Forms of Energy Mechanical Focus for now May be kinetic (associated with motion) or potential (associated with position) Chemical Electromagnetic.
Ch. 5 Work and Energy. 5-1 Work W = F X d W net = F net d(cos θ) Work (J) Force (N) distance (m) Work is NOT done on an object unless it moves.
Chapter 5 Work and Energy. 6-1 Work Done by a Constant Force The work done by a constant force is defined as the distance moved multiplied by the component.
Forms of Energy Mechanical Focus for now May be kinetic (associated with motion) or potential (associated with position) Chemical Electromagnetic Nuclear.
Work and Power Chapter 5. Work Work is done when a force causes a displacement in the direction of the force W = Fd (force and displacement parallel)
Work. Energy has the ability to do work; it can move matter. Work may be useful or destructive. Introduction.
PREVIOUS QUIT NEXT START SLIDE Quiz by Dr. John Dayton Physics Quiz ENERGY Each question is multiple choice. Select the best response to the question.
Chapter 6 - Work and Kinetic Energy Learning Goals What it means for a force to do work on a body, and how to calculate the amount of work done. The definition.
Energy Work Kinetic Energy & Work-Energy Theorem Gravitational Potential Energy.
Chapter 6 Work and Energy. Units of Chapter 6 Work Done by a Constant Force Kinetic Energy, and the Work-Energy Principle Potential Energy Conservative.
Chapter 6 Notes. Chapter Work  Work is equal to the product of the magnitude of the displacement times the component of the force parallel to the.
Work and Energy. Work Done by a Constant Force The work done by a constant force is defined as the distance moved multiplied by the component of the force.
Chapter 7 Work and Energy. Conservation Laws Mass Mass Electric Charge Electric Charge Conservation of Energy Conservation of Energy Sum of all forms.
Work and Energy Conservation of Energy. Conserved Quantities Conserved – remains constant –M–M–M–May change form Mass and energy are both conserved.
Chapter 6: Work and Energy Essential Concepts and Summary.
Work, Energy and Power   Introduction   Energy is used to do work Mechanical – motion of objects and gravity   Types of energy: solar, chemical,
Work, Power and Potential energy Lecture Work KJF §10.4.
Chapter 5: Energy Energy
© Houghton Mifflin Harcourt Publishing Company Chapter 5 Definition of Work Work is done on an object when a force causes a displacement of the object.
Work and Energy. Scalar (Dot) Product When two vectors are multiplied together a scalar is the result:
Work Readings: Chapter 11.
WORK, ENERGY & POWER. Work  A measure of the amount of energy transformed from one form to another  For example, work is done when energy is used to.
Chapter 5 Energy. Forms of Energy Mechanical Focus for now May be kinetic (associated with motion) or potential (associated with position) Chemical Electromagnetic.
Chapter 10: Section 2.  Describe the First Law of Thermodynamics  Make calculations involving changes in internal energy  Create and analyze energy.
Work, Power & Energy. Forms of Energy Mechanical Focus for now May be kinetic (associated with motion) or potential (associated with position) Chemical.
Work… In everyday speech work has a very general meaning. In describing motion in physics, work has a very specific meaning.
Work The work done on an object by a constant force is given by: Units: Joule (J) The net work done on an object is the sum of all the individual “works”
Energy, Kinetic Energy, Work, Dot Product, and Power 8.01 W08D1 Fall 2006.
Work Done by a Constant Force The work done by a constant force is defined as the distance moved multiplied by the component of the force in the direction.
1 5. Work and Energy 5.1. Work The work done by a constant force is given by the dot product of that force and a displacement vector (5.1) F t – projection.
Energy Mrs Celin Energy Mrs Celin. Forms of Energy  Your input in class  Mechanical Focus for now Focus for now May be kinetic (associated with motion)
Work and Energy  Work done by a Force  Kinetic Energy  Potential Energy  Conservative Force  Non Conservative Force  Conservation of Mechanical Energy.
Unit 1 C Work Energy Power. Forms of Energy Mechanical Mechanical focus for now focus for now chemical chemical electromagnetic electromagnetic nuclear.
Three things necessary to do Work in Physics:
Conservative and Nonconservative Forces
5. Work and Energy 5.1. Work The work done by a constant force is given by the dot product of that force and a displacement vector (5.1) Ft – projection.
Chapter 6 Work and Energy
REVISION MATERIAL FOR PHYSICAL SCIENCES
Potential Energy and Conservation of Energy.
Chapter 6 Work and Energy
Potential Energy and Conservation of Energy
Chapter 13 Work and Energy.
ENERGY The SI unit of energy is the Joule.
Work and Energy.
Energy.
Conservation of Energy
Presentation transcript:

AP Physics C: Mechanics Work & Energy

The ability of a physical system to cause change What is Energy? The ability of a physical system to cause change What is its definition? Energy can come in many forms and is transferrable. It is a conserved quantity in the universe. What are its properties? Chemical, electrical, nuclear, thermodynamic, light, mechanical, kinetic, potential, elastic, etc. What forms can it be in?

Work (Energy) is a scalar quantity. What is Work? The amount of energy transferred by a force acting through a displacement What is its definition? Work (Energy) is a scalar quantity. What are its properties? How can it be calculated? W=fscosθ

Work The area under an Force-displacement graph

Work Work is an energy transfer. If energy is added to the system then W is positive. If energy is transferred from the system then W is negative.

Work Work is a scalar. The NET work on an object is the sum of the work done by each force acting on it.

Work Units of work 1 erg=10-7J System Unit Alternate name SI Nm Joule (J) cgs dyne*cm erg English foot*pound - 1 erg=10-7J

Work-Energy Theorem The work done by a net force in displacing a particle equals the change in kinetic energy of the particle. Stress on the word particle. This is a drastic idealization.

Mechanical Potential Energy Gravitational Elastic

Conservation of Energy This is always true, but mechanical energy is only conserved when only conservative forces are present. Work done by a conservative force is path independent Forces such as friction and air drag are non-conservative. They result in energy dissipated as heat.

What is it?

Power The time rate at which work is being done. How do we calculate it? If a net force acts on a particle and does work W over an interval of time Δt, then the average power is:

Power The time rate of energy transfer. Instantaneous Power

Power Watt are the units? 1hp=550ft*lbs/sec=746W Note: A kilowatt-hour is often used by power companies. What is it a measure of?

Potential Energy and Conservative Forces Potential energy is only associated with conservative forces. If an object or field does work on some external object, energy is transferred from the object or field to the external object: The energy transferred as work decreases the potential energy of the system from which it came.

Potential Energy and Conservative Forces The conservative force equals the negative (partial) derivative of the potential energy with respect to x. The negative sign means that the final potential energy of the system is lower than the initial as the conservative force does work.

Potential Energy and Conservative Forces Examples:

Feedback: Privacy Policy Feedback
Do Not Sell My Personal Information
About project: SlidePlayer Terms of Service

© 2025 SlidePlayer.com. Inc. All rights reserved.