PPT-Work Done by a Constant Force

Objectives Define mechanical work Calculate the work done in various situations Work Fcos d Defining work The Three Requirements for Work Force displacement and cause. Energy and Work. A body experiences a change in energy when one or more forces do . work. on it. A body must . move. under the influence of a force or forces to say work was done.. A force does . positive. th. floor with an acceleration of 0.629 m/s. 2 . . As the elevator goes downwards, the acceleration of the elevator is 0.232m/s. 2. . Philip, who weighs 150. lbs, stands on a bathroom scale in this elevator. . True. False. A constant . non-zero net . force on an object will cause its velocity to change.. True. False. A constant non-zero net force applied to an object initially at rest will cause the object to move with . - Class . 16. Today:. Energy in Collisions. Work. Reading . Quiz:. Last day I asked at the end of class:. If one object does work on another object, does energy always get transferred from one object to the other?. ©2009 by Goodman & 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. . 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.. . Actual. . Work. . Definition of Work. Work on . Particle. Potential Energy. . Definition of Energy. Potential . Energy. . Kinetics . Energy. . Definition of . Energs. Work-Energy Equation. . Instructor: Dr. Tatiana Erukhimova. . Lectures 13, 14, 15. F. Find F necessary to drag the box 1 at constant speed.. 1. 2. Friction everywhere. . The advantage of a pulley. What minimum force F is needed to lift the piano of mass M? . Work, . Enery. , & Power. Work and Energy. Work & Energy. Work is defined as the . transfer. of energy from one body to another.. Or more rigorously:. We can calculate the work done on an object with:. Turn in lab from yesterday. C . Test Takers:. Go over MC. Notes/Lecture . Variable Forces. Drag Equation Derivation. B Test Takers:. MOPing. on computers . (. pick a problem area). Calculating Work a Different Way. 6.1 Work Done By A Constant Force. When a force acts upon an object to cause a displacement of the object, it is said that . work. was done . upon. the object. . In order for a force to qualify as having done . Work is done when:. A . force . is exerted on an object. An object has a . displacement . in the same direction as the force. W=. Fdcos. q. SI unit for work is . Joule . (. J. ). 1 J = 1N*m (=0.7376 . Lesson 5.1 Work Essential Question: How do you calculate work? Which situation is an example of work? Holding a set of exercise weights up in the air Pushing your car down the street because it ran out of gas . 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. .