Physics Lab 3.docx - Online Lab 3 Vector Addition Amy Dixon...

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Online Lab 3: Vector Addition Amy Dixon Phys-2125-10643 DUE DATE: 9/05/2020
OBJECTIVES When several forces passing through the same point, act on an object, they may be replaced by a single force which is called the resultant or the sum. The resultant therefore is a single force which is similar in effect to the effect produced by the several forces acting on the body. It is therefore a single force that replaces those forces. The objectives of this lab are to use graphical, analytic and experimental methods to: 1. Resolve a force vector into its rectangular components, and 2. To find the resultant of several forces acting on a body. Equipment 1. Force table 5. Strings for suspending the masses 2. Four weight holders 6. A ring 3. Four pulleys 7. A metal pin 4. Slotted weights 8. A protractor 9. A compass 10. Sheets of plain or graph paper. 11. Ruler THEORY OF VECTOR ADDITION A. Graphical Methods Parallelogram Method Vectors are represented graphically by arrows. The length of a vector arrow (drawn to scale on graph paper) is proportional to the magnitude of the vector, and the arrow points in the direction of the vector. The length scale is arbitrary and usually selected for convenience so that the vector graph fits nicely on the graph paper. See Fig 1a, where R = A + B . The magnitude R

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