PPT-Work and Energy

2009 by Goodman amp Zavorotniy The most powerful concepts in science are called 
conservation principles These principles allow us to 
solve problems without worrying much about the details 
of a process . Explaining the Causes of Motion in a Different Way. Work. The . product. of force and the amount of displacement along the line of action of that force.. Units: ft . .. lbs (horsepower). . Newton•meter. Work. Work is defined as the force parallel to the direction of motion times the distance.. W = F. (parallel) . . . d = F d . cos. . θ. If the direction of the force is opposite of the motion, the work is considered to be negative.. 14) explain the relationship between work and power (using narrative and mathematical descriptions) and apply to realistic situations (GPS, HSGT) (SCPH_C2005-14). 14a) calculate the work on a body by constant force. Work . = W. The product of the force . F . applied to an object over a distance . d . in which the object travels as a result of the force. Joule . (J) . is the base unit of work. (Force and distance must be parallel to each other). Homework:. Read . pages 257 – 260 . Answer questions p 261 # 1, 2, 3. P 262 #5, 6, 7, 8. Recall. :. A change in an object’s . momentum. is related to the amount of . time. a . force. acts on an object.. Lecture slides by. Mehmet . Kanoglu. Copyright © The McGraw-Hill Education. Permission required for reproduction or display.. Thermodynamics: An Engineering Approach . 8th . Edition. Yunus A. . Ç. engel, Michael A. Boles. IPC Spring . 2014. Energy, Work, Power & Machines. 1. Energy. is the ability to do work. .  . Potential energy. – stored energy or energy due to position.  . PE=m g h . m. is mass (kg). g. (Chapter 4). Student Learning Objectives. Compare and contrast . mechanical work. , energy, . and power. N. ame . examples of simple . machines. Describe . renewable energy sources.. https://www.youtube.com/watch?v=eh7uFumf-vc. You . need energy to force an object to move. You need energy to make matter change. . The . blowing wind, the warm Sun and a falling leaf are all examples of energy in use. .. . Energy makes motion and change possible.. Principles of Engineering. Work. . Work. (symbol . W. ) is the energy transferred when a force . F. is applied to an object moving through a . distance . d. .. The SI . unit of work or . energy is the joule (symbol J).. Work Energy and Momentum Physics Unit 3 This Slideshow was developed to accompany the textbook OpenStax Physics Available for free at https:// openstaxcollege.org/textbooks/college-physics By OpenStax Vocab. Energy – the ability to do work or cause change. Motion – an object’s position changes relative to another object. Force – a push or pull. Work – when the force exerted is in the same direction as the motion. Reminders about work and energy. 1 joule is equivalent to the energy required for a force of exactly 1 newton to act through a distance of exactly 1 . mete. r. Principle of conservation of energy. : energy cannot be created nor destroyed; it can only be transformed from one type to another.. . 2012. Objectives.. To define work by relating force and displacement. . To . calculate the net work done when many forces are applied to an object. . To . identify several forms of mechanical energy. .