Work and Kinetic Energy Why are they clapping he did not do work.

Slides:



Advertisements
Similar presentations
بسم الله الرحمن الرحيم Dr- Sonia Reda.
Advertisements

Investigate quantities using the work-energy theorem In this presentation you will: F d m Work-Energy Theorem Next >
P2 Additional Physics.
Chapter 4 Work and Energy Additional Concepts For Describing Motion.
F rF is variable The two quantities are equal ( Work, K.E theorem )
PHYSICS 231 INTRODUCTORY PHYSICS I
Physics 111: Mechanics Lecture 6
Work is only done by a force on an object if the force causes the object to move in the direction of the force. Objects that are at rest may have many.
Energy the ability (capacity) to do work Energy comes in many forms: mechanical, electrical, magnetic, solar, thermal, chemical, etc... thermal, chemical,
Physics 111: Mechanics Lecture 6 Wenda Cao NJIT Physics Department.
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. 
In this chapter you will:  Recognize that work and power describe how the external world changes the energy of a system.  Relate force to work and explain.
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.
Welcome to Physics JEOPARDY
Power, Work and Energy Physics January 2 and 3. Objectives Define and Describe work, power and energy Evaluate how work, power and energy apply to the.
Kinetic Energy A moving object has energy because of its motion. This energy is called kinetic energy.
Aim: What are Potential and Kinetic Energy? Do Now: A girl lifts a 10 kg object 1.5 m straight up. How much work has she done? W = Fd W = F g d W = (10.
An Introduction to Work and Energy Unit 4 Presentation 1.
7.4 Work Work, W is energy transferred to or from an object by means of a force acting on the object. Energy transferred to the object is positive work,
Energy and work Sections 12, 13, 14 and 15
Work, Kinetic Energy, and Power. v f 2 = v i 2 + 2ad and F = ma v f 2 -v i 2 = 2ad and F/m = a v f 2 -v i 2 = 2(F/m)d Fd = ½ mv f 2 – ½ mv i 2 Fd = Work.
Work, Energy, Power and Conservation Laws. In this week we will introduce the following concepts: o Kinetic energy of a moving object o Work done by a.
Work and Energy.
Chapter 5: Work & Energy The Work/Energy Relationship.
Work is said to be done if a force causes a displacement in a body in the direction of force. Work is the dot product of force and displacement. Work is.
The Work-Energy Theorem Physics 6(A). Learning Objectives Explain how work is done on an object Describe the relationship between the work done on an.
Aim: How can we solve problems dealing with kinetic energy?
Lecture 10: Work & Energy.
Work Work is a scalar quantity and has the following conditions: a force must be exerted on an object the object must be displaced by the force at least.
WORK A force that causes a displacement of an object does work on the object. W = F d Work is done –if the object the work is done on moves due to the.
Work and Kinetic Energy. What is kinetic energy?  If an object is moving, it has energy. You can think of kinetic energy as the energy of motion, and.
2009 Physics 2111 Fundamentals of Physics Chapter 7 1 Fundamentals of Physics Chapter 7 Kinetic Energy & Work 1.Energy 2.Work 3.Work & Kinetic Energy 4.Work.
Rotational Dynamics 8.3. Newton’s Second Law of Rotation Net positive torque, counterclockwise acceleration. Net negative torque, clockwise acceleration.
Work, Power, Energy and Motion Work, Power, Energy and Motion moving train cars moving electrons nuclear forces chemical forces gravitational force Electrical.
Kinetic Energy and Work. Energy Loosely defined as the ability to do work There are many types of energy, but the total energy of a system always remains.
Chapter 6: Work and Energy  Alternative method for the study of motion  In many ways easier and gives additional information  Kinetic energy: consider.
Pre-AP Physics.  Energy is expressed in JOULES (J)  4.19 J = 1 calorie  Energy can be expressed more specifically by using the term WORK(W) Work =
K INETIC E NERGY AND W ORK. E NERGY Loosely defined as the ability to do work There are many types of energy, but the total energy of a system always.
The Work-Energy Theorem Derivation: v f 2 =v i 2 +2ad Kinematics Equation mv f 2 =mv i 2 +2madDynamics equation (1/2)[mv f 2 =mv i 2+2mad] mad= ½ mv f.
Objectives: The student will be able to: 1. Define each type of mechanical energy and give examples of types of energy that are not mechanical. 2. State.
Work-Energy Theorem Work : W net = F net d However, we know F net = ma So work gives an object some acceleration Acceleration means the velocity changes.
PHY 205 Ch2: Motion in 1 dimension 6.1 Work Done by a Constant force Ch6 Work & kinetic Energy A. W 0 D. Depends.
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.
FORCE AND MOTION IDEAS WHAT DO YOU KNOW OR THINK YOU KNOW?!?!
 Work  Energy  Kinetic Energy  Potential Energy  Mechanical Energy  Conservation of Mechanical Energy.
Work is only done by a force on an object if the force causes the object to move in the direction of the force. Objects that are at rest may have many.
1 PPMF102 – Lecture 2 Work & Energy. 2 Work = force x displacement x cos  Work = force x displacement x cos  W = Fs cos  W = Fs cos  Scalar quantity.
NM Unit 6 Topic: Work and Energy Learning Goals: Identify the types of energy that make up the total energy of a system Predict changes in mechanical energy.
Energy Notes Energy is one of the most important concepts in science. An object has energy if it can produce a change in itself or in its surroundings.
Aim: How can we apply work- energy to motion problems? Do Now: In your own words, what does energy mean to you? In your own words, what does energy mean.
Conservation of Energy (a.k.a Slacker Physics). Now, Really…Conservation of Energy In a system, energy can not be created or destroyed. Energy can change.
Work is a Scalar Quantity +ve Work -ve Work energy transferred to the object energy transferred from the object.
Work is a Scalar Quantity +ve Work -ve Work energy transferred to the object energy transferred from the object.
Chapter 7 Kinetic Energy and Work 第7章 動能與功
Work and Kinetic Energy
Homework Questions?.
Work.
KINETIC ENERGY AND WORK
Work and Energy SPH3U.
Chapter 7 Kinetic Energy and Work
Physics 11a.
Work, Energy, and Power.
Work is only done by a force on an
Chapter 7 Kinetic Energy and Work
Kinetic Energy and Work
Chapter 7 Kinetic Energy and Work
Energy, e (Units of joules (J))
Chapter 5 Work and energy.
Chapter 6 Energy.
Do Now: If you were to drop a penny from the top of a building what would happen to the potential and kinetic energy of the penny as it falls?
Presentation transcript:

Work and Kinetic Energy

Why are they clapping he did not do work

K.E is a scalar Quantity K.E Can not be Negative K.E is measured by Joule (J)

Work Work is energy transferred to or from an object by means of force acting on the object Work is said to be positive if transferred to the object and negative if transferred from the object Work is a scalar quantity that has the same units of Energy ( Joule )

What is work ? What is the difference between work and doing work ? And what are the units of work ?.

I applied the breaks to stop the car what work did friction do on my car ?

Answer

Can we replace the forces by their resultant ? Then work is defined as:And work K.E theorem becomes

=10N =12N What is the work done by mg and N ?

Moving Down Moving up If it starts from rest and ends at rest or if it moves with constant velocity then

Sample Problem As the box is stationary at the the start and the end of the motion

Sample Problem Alternative way

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

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