Work, Kinetic Energy, Potential Energy & Springs ~ Conservation of Energy.

Slides:



Advertisements
Similar presentations
Work and Energy.
Advertisements

Types of Energy Principles of Physics.
Gravitational potential energy. Conservation of energy
Work Done by Non-conservative Forces
Energy Conversion of Energy Forms of Energy Energy Work.
AP Physics I.C Work, Energy and Power.
Energy Chapter 5. Mechanical Energy Energy due to movement or position. Energy due to movement or position. Kinetic Energy – energy of motion Kinetic.
Phy100: More on Energy conservation Mechanical energy (review); Goals: Work done by external forces; Understand conservation law for isolated systems.
Science w/ Ms. Hendryx 9/22/11. Velocity: m/s (distance over time) Position: m (distance) Acceleration: m/s 2 (distance over time squared) Mass: kg Force:
DEFINITION OF KINETIC ENERGY Kinetic energy is the energy of motion
Department of Physics and Applied Physics , F2010, Lecture 13 Physics I LECTURE 13 10/20/10.
Physics 151: Lecture 15, Pg 1 Today’s Topics l Potential Energy, Ch. 8-1 l Conservative Forces, Ch. 8-2 l Conservation of mechanical energy Ch.8-4.
Instructor: Dr. Tatiana Erukhimova
Physics is mathematical not because we know so much about the physical world, but because we know so little; it is only its mathematical properties that.
Conservation of Energy
1a. Positive and negative work
Copyright © 2007, Pearson Education, Inc., Publishing as Pearson Addison-Wesley. Important forms of energy How energy can be transformed and transferred.
Physics 218: Mechanics Instructor: Dr. Tatiana Erukhimova Lecture 23.
Copyright © 2007, Pearson Education, Inc., Publishing as Pearson Addison-Wesley. Important forms of energy How energy can be transformed and transferred.
Principles of Physics - Foederer. Energy is stored in a spring when work is done to compress or elongate it Compression or elongation= change in length.
The power of Niagra Falls Height: 167 ft Flow: 600,000 U.S. gallons per second.
Chapter 8 Conservation of Energy 8.2 Gravitational Potential Energy 8-3 Mechanical Energy and Its Conservation 8-4 Problem Solving Using Conservation of.
Springs and Hooke’s Law
Day 11 – June 3 – WBL Much of physics is concerned with conservation laws – we’ll learn the 3 most important of these in PC141. A conservation.
Chapter 5 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.
Chapter 8: Potential Energy and Conservation of Energy
CONSERVATION OF MECHANICAL ENERGY Kinetic Energy and Potential Energy.
Units: 1Newton . 1 meter = 1 joule = 1J
Potential Energy and Conservative Forces
Work and Energy: Jeopardy Review Game $2 $5 $10 $20 $1 $2 $5 $10 $1 $2 $5 $10 $1 $2 $5 $20 $5 $1 Kinetic Energy Potential Energy MachinesWork and Power.
Chapter 8 - Potential Energy and Conservation of Energy Conservative vs. Non-conservative Forces Definition of Potential Energy Conservation Of Mechanical.
PHYS 2010 Nathalie Hoffmann University of Utah
Formative Assessment. FA6.2: 1. A 5.20 kg object speeds up from 3.10 m/s to 4.20 m/s. What is the change in kinetic energy? (20.9 J)
Mechanics 105 Work done by a constant force Scalar product Work done by a varying force Kinetic energy, Work-kinetic energy theorem Nonisolated systems.
Springs and Hooke’s Law Physics 11. Newton’s Cradle  Explain this…  0HZ9N9yvcU.
1 PPMF102– Lecture 3 Linear Momentum. 2 Linear momentum (p) Linear momentum = mass x velocity Linear momentum = mass x velocity p = mv p = mv SI unit:
Physics 11 Advanced Mr. Jean May 9th, The plan: Video clip of the day Review of Last day’s inelastic situation Spring Application Question.
Energy Examples Serway and Jewett 8.1 – 8.3 Physics 1D03 - Lecture 22.
Conservation of Energy
332 – UNIT 6 WORK & ENERGY.
Motion, Forces and Energy Lecture 7: Potential Energy & Conservation The name potential energy implies that the object in question has the capability of.
Physics 11 Advanced Mr. Jean May 8th, The plan: Video clip of the day Review of yesterday Perfectly Elastic Bouncing Balls Not perfectly Elastic.
Work and Energy x Work and Energy 06.
Energy & Momentum Problems (CP)
WHITE BOARD TIME !! CONSERVE ENERGY. E T = PE G + KE + PE S When comparing the energy at two different positions on a system, the total energy at one.
1. Work [W] = N*m = J Units: Work done by forces that oppose the direction of motion will be negative. Work and energy A. PositiveB. NegativeC. Zero Example:
Potential and Kinetic Energy…
Ms. Moore 10/1/12.  Energy is required for any change that occurs, no matter how small.  Energy is the ability to cause change.  Examples:  Forms.
Conservation of Energy
Physics 1D03 - Lecture 19 Kinetic Energy. Physics 1D03 - Lecture 19 Then the Work-Energy Theorem says: The total work done by all external forces acting.
Physics 1D03 - Lecture 331 Harmonic Motion ( II ) (Serway 15.2, 15.3) Mass and Spring Energy in SHM.
Springs and Hooke’s Law Physics 11. Springs A mass-spring system is given below. As mass is added to the end of the spring, what happens to the spring?
Copyright © 2007, Pearson Education, Inc., Publishing as Pearson Addison-Wesley. Important forms of energy How energy can be transformed and transferred.
Physics 218: Mechanics Instructor: Dr. Tatiana Erukhimova Lectures 16, 17, 18.
IB Physics 11 Mr. Jean November 3 rd, The plan: Video clips of the day Work Potential energy –Gravitational potential kinetic energy.
Warm up – Do old way A boy pulls a large box with a mass of 50 kg up a frictionless incline (
Conservation of Energy Aim: How does energy transfer from one form to another?
Potential and Kinetic Energy Aim: How can we determine the different types of energy an object has?
Energy of Simple Harmonic Motion
1a. Positive and negative work
Chapter 7 Work and Energy
Conservative and Nonconservative Forces
Work and energy 1. Work Wf = |fk| |Δx| cos(180°) = -|fk| |Δx| < 0
Chapter 5 Work and Energy
Conservation Laws Mechanical Energies
Potential Potential Energy
Total Energy before = Total Energy After
PE, KE Examples Answers 1. A shotput has a mass of 7.0 kg. Find the potential energy of a shotput raised to a height of 1.8 m. m = 7.0 kg h.
T101-Q-1 Figure 1 shows the spring force as a function of position x for a spring-block system resting on a frictionless table. The block is released at.
GRAVITATIONAL POTENTIAL & KINETIC ENERGY
Presentation transcript:

Work, Kinetic Energy, Potential Energy & Springs ~ Conservation of Energy

Some definitions:

Work and Kinetic Energy video

In 1996, Paul Tracy, while riding in his Indie Car that had a mass of 711 kg, was able to achieve a world record velocity of km/h. What was his kinetic energy at that time? P 290 – Q 2, 3, 4

Potential Energy video 2 nd Potential Energy video

Spring Energy video 2 nd Spring Energy video 3 rd Spring Energy video 4 th Spring Energy video 5 th Spring Energy video

InitialFinal √x xx x√ xx A question will dictate which energies are involved. We must consider ALL types of energies in a problem, so that nothing is forgotten. This little table helps to remind you of all the energies as a check-list. The long equation above is greatly simplified in the next step thanks to this table.

A 3.0 kg watermelon is dropped from a building that is 48.0 m tall. Neglecting air-resistance, what is the speed of the watermelon just as it strikes the ground? Does the mass of the melon matter? InitialFinal x√ √x xx xx

A 2.0 kg block is sliding on a level, frictionless surface when it encounters a spring bumper. The spring has a spring coefficient of 62 N/m and is compressed 4.80 cm. How fast was the block moving? InitialFinal √x xx x√ xx

Page342. Questions: 29, 32, 36, 52, 54

Spring Energy Discoveries in physics Drop Feather and Hammer Energy Review 2 nd Potential Energy video