117805281-Mastering-Physics - HOMEWORK3 Due 11:00pm on Sunday Note You will receive no credit for late submissions To learn more read your instructor's

117805281-Mastering-Physics - HOMEWORK3 Due 11:00pm on...

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HOMEWORK3 Due: 11:00pm on Sunday, November 11, 2012 Note: You will receive no credit for late submissions. To learn more, read your instructor's Grading Policy Free-Body Diagrams Learning Goal: To gain practice drawing free-body diagrams Whenever you face a problem involving forces, always start with a free-body diagram.To draw a free-body diagram use the following steps:1. Isolate the object of interest. It is customary to represent the object of interest as a point inyour diagram.2. Identify all the forces acting on the object and their directions. Do not include forces acting onother objects in the problem. Also, do not include quantities, such as velocities andaccelerations, that are not forces.3. Draw the vectors for each force acting on your object of interest. When possible, the length ofthe force vectors you draw should represent the relative magnitudes of the forces acting on theobject.In most problems, after you have drawn the free-body diagrams, you will explicitly label your coordinateaxes and directions. Always make the object of interest the origin of your coordinate system. Then you willneed to divide the forces into xand ycomponents, sum the xand yforces, and apply Newton's first orsecond law.In this problem you will only draw the free-body diagram.Suppose that you are asked to solve the following problem:Chadwick is pushing a piano across a level floor (see the figure). The piano can slide across the floorwithout friction. If Chadwick applies a horizontalforce to the piano, what is the piano'sacceleration?To solve this problem you should start by drawinga free-body diagram.Part ADetermine the object of interest for the situation described in the problem introduction.Hint 1. How to approach the problemYou should first think about the question you are trying to answer: What is the acceleration ofthe piano? The object of interest in this situation will be the object whose acceleration you areasked to find.
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ANSWER: Correct Part B Identify the forces acting on the object of interest. From the list below, select the forces that act on thepiano.Check all that apply.
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