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”

Slides:



Advertisements
Similar presentations
Chapter IV Work and Energy
Advertisements

Physics 101: Lecture 12, Pg 1 Physics 101: Lecture 12 Work and Energy l Chapter 6: Work and Energy l Reminders: è Exam I, Tuesday September 30 th at 5.
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.
Physics 101: Lecture 13, Pg 1 Physics 101: Lecture 13 l Quick Review of Last Time, Example Problems l Power, Work done by a variable force l Reminders:
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. Energy and Work Kinetic energy Work done by a constant force Work–kinetic energy theorem.
Potential Energy and Conservation of Energy Work and Potential Energy Path Independence of Conservative Forces Determining Potential Energy Conservation.
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.
Work and Energy Work done by a constant force Work-Energy Theorem and KE Gravitational Potential Energy Conservative Forces vs Non- conservative Forces.
Ch 6 Work and Energy.
Chapter 6 Work and Energy
Chapter 5 Energy. Forms of Energy Mechanical Focus for now May be kinetic (associated with motion) or potential (associated with position) Chemical Electromagnetic.
WORK The work dW done on a particle displaced along differential path dr, by an object exerting force F is defined as A B F dr The SI unit of work is 1J.
Forms of Energy Mechanical Focus for now May be kinetic (associated with motion) or potential (associated with position) Chemical Electromagnetic Nuclear.
Chapter 7 Energy of a System. Introduction to Energy A variety of problems can be solved with Newton’s Laws and associated principles. Some problems that.
Work. Energy has the ability to do work; it can move matter. Work may be useful or destructive. Introduction.
Work Done by a Varying Force (1D). Force Due to a Spring – Hooke’s Law.
Chapters 6, 7 Energy.
Chapter 6 Work and Energy. Units of Chapter 6 Work Done by a Constant Force Work Done by a Varying Force Kinetic Energy, and the Work-Energy Principle.
Sect. 7.7: Conservative & Non- Conservative Forces.
Energy Work Kinetic Energy & Work-Energy Theorem Gravitational Potential Energy.
Conservative Forces: The forces is conservative if the work done by it on a particle that moves between two points depends only on these points and not.
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.
Work & Energy Chapters 7-8 Work Potential Energy Kinetic Energy Conservation of Mechanical Energy.
© 2010 Pearson Education, Inc. Lecture Outline Chapter 5 College Physics, 7 th Edition Wilson / Buffa / Lou.
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 6: Work and Energy Essential Concepts and Summary.
Energy. WORK ENERGY THEOREM For an object that is accelerated by a constant force & moves in the same direction… Lets derive this…
Physics 101: Lecture 13, Pg 1 Physics 101: Lecture 13 l Quick Review of Last Time, Example Problems l Power, Work done by a variable force l Reminders:
REVISION NEWTON’S LAW. NEWTON'S UNIVERSAL GRAVITATION LAW Each body in the universe attracts every other body with a force that is directly proportional.
Chapter 7 Outline Potential Energy and Energy Conservation Gravitational potential energy Conservation of mechanical energy Elastic potential energy Springs.
Chapters 7, 8 Energy. What is energy? Energy - is a fundamental, basic notion in physics Energy is a scalar, describing state of an object or a system.
1 Chapter 7 Potential Energy Potential Energy Potential energy is the energy associated with the configuration of a system of two or more interacting.
Chapter-6 Work and Energy Work Done by a Constant Force Work is done when a force F pushes a car through a displacement s. Work = Force X Displacement.
7.2 Work Done by a Constant Force 7.1 Work done by a constant force The work, W, done on a system by an agent exerting a constant force on the system is.
© 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.
1 AP Physics Exam 2 Review Chapter Newton’s Three Laws of Motion 1 st :An object with no net force acting on it remains at rest or moves with constant.
Work and Energy. Scalar (Dot) Product When two vectors are multiplied together a scalar is the result:
Work and Energy Physics 1. The Purpose of a Force  The application of a force on an object is done with the goal of changing the motion of the object.
Work Readings: Chapter 11.
Conservation of Energy
Physical Modeling, Fall WORK Work provides a means of determining the motion of an object when the force applied to it is known as a function of.
In this chapter we will introduce the following concepts:
Work and Energy. Work Done by a Constant Force Work: The __________done by a constant ________acting on an object is equal to the product of the magnitudes.
Chapter 5 Work and Energy. Mechanical Energy  Mechanical Energy is the energy that an object has due to its motion or its position.  Two kinds of mechanical.
Work and Energy Energy. Kinetic Energy Kinetic energy – energy of an object due to its motion Kinetic energy depends on speed and mass Kinetic 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 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.
Work, energy, and power. If the net force is in the direction of motion work is positive If the net force is in the direction opposite that of motion.
Unit 1 C Work Energy Power. Forms of Energy Mechanical Mechanical focus for now focus for now chemical chemical electromagnetic electromagnetic nuclear.
Kinetic energy exists whenever an object which has mass is in motion with some velocity. Everything you see moving about has kinetic energy. The kinetic.
© 2010 Pearson Education, Inc. Lecture Outline Chapter 5 College Physics, 7 th Edition Wilson / Buffa / Lou.
PHY 102: Lecture 4A 4.1 Work/Energy Review 4.2 Electric Potential Energy.
Three things necessary to do Work in Physics:
Conservative and Nonconservative Forces
Work, energy and power.
Chapter 6 Work and Energy
Work and Energy Chapter 6.
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.
Work and Energy.
Chapter 6 Work and Energy
Energy.
Chapter 5 Work and energy.
Work, Energy and Power.
Presentation transcript:

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”

x

x

Work-Kinetic Energy Theorem The net work done on an object: The kinetic energy of an object: The Work-Kinetic Energy Theorem:

Conservative vs. Nonconservative forces There are two general kinds of forces: conservative forces and nonconservative forces. A force is conservative if the work it does in moving an object between two points is the same no matter which path is taken. Gravity is a conservative force. Friction is a nonconservative force.

Gravitational Potential Energy The gravitational potential energy of a system consisting of the Earth and an object of mass m near the Earth’s surface is given by: Units: Joule (J)

What if there are no nonconservative forces (i.e. there is no friction)? Then W nc =0.

Conservation of Mechanical Energy In a system with no nonconservative forces, the total mechanical energy of the system remains the same at all times.

Spring Potential Energy This is also called the Elastic Potential Energy.

The spring force varies – it depends on x. So to figure out the work done by the spring force, we will use the average spring force.

Power If an external force is applied to an object and if the work done by this force is W in the time interval  t, then the average power is:

Work done by a varying force The work done by a variable force acting on an object that undergoes a displacement is equal to the area under the graph of F versus x.

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

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