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Work force displacement 2000N 20m500j 10m700j 350N |
| Answer» <html><body><p>ConceptsCalculating the Amount of Work Done by ForcesDefinition and Mathematics of WorkCalculating the Amount of Work Done by ForcesPotential EnergyKinetic EnergyMechanical EnergyPowerIn a previous part of Lesson 1, work was described as taking place when a force acts upon an object to <a href="https://interviewquestions.tuteehub.com/tag/cause-910965" style="font-weight:bold;" target="_blank" title="Click to know more about CAUSE">CAUSE</a> a displacement. When a force acts to cause an object to be displaced, three quantities must be <a href="https://interviewquestions.tuteehub.com/tag/known-534098" style="font-weight:bold;" target="_blank" title="Click to know more about KNOWN">KNOWN</a> in order to calculate the work. Those three quantities are force, displacement and the angle between the force and the displacement. The work is subsequently calculated as force•displacement•cosine(theta) where theta is the angle between the force and the displacement vectors. In this part of Lesson 1, the concepts and mathematics of work will be applied in order to analyze a variety of physical situations. Check Your UnderstandingExpress your understanding of the concept and mathematics of work by answering the following questions. When done, click the button to view the answers.1. Apply the work equation to determine the amount of work done by the applied force in each of the three situations described below.See Answer 2. On many occasions, there is more than one force acting upon an object. A free-body diagram is a diagram that depicts the type and the direction of all the forces acting upon an object. The following descriptions and their accompanying free-body diagrams show the forces acting upon an object. For each case, indicate which force(s) are doing work upon the object. Then calculate the work done by these forces. Free-BodyDiagramForces Doing Workon the ObjectAmount of Work Doneby Each ForceA 10-N force is applied to push a block across a friction free <a href="https://interviewquestions.tuteehub.com/tag/surface-1235573" style="font-weight:bold;" target="_blank" title="Click to know more about SURFACE">SURFACE</a> for a displacement of 5.0 m to the right.See AnswerSee AnswerA 10-N <a href="https://interviewquestions.tuteehub.com/tag/frictional-465947" style="font-weight:bold;" target="_blank" title="Click to know more about FRICTIONAL">FRICTIONAL</a> force slows a moving block to a stop after a displacement of 5.0 m to the right.See AnswerSee AnswerA 10-N force is applied to push a block across a frictional surface at constant speed for a displacement of 5.0 m to the right.See AnswerSee AnswerAn approximately 2-kg object is sliding at constant speed across a friction free surface for a displacement of 5 m to the right.See AnswerSee AnswerAn approximately 2-kg object is pulled upward at constant speed by a 20-N force for a vertical displacement of 5 m.See AnswerSee Answer</p></body></html> | |