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Abasiono Bassey PHYS 2125-0043 June 7, 2019 Experiment 2 Vector Addition
Objectives 1. Obtain the resultant of a number of forces acting on a body. 2. Obtain the resultant of the same forces by drawing a vector diagram to scale to find its magnitude and direction. 3. Determine of the resultant using the analytical method, including the law of cosine for the magnitude and the law of sine to find its direction in one instance. The components method will also be used. Materials 1. Force table 5. Strings for suspending the masses 2. Weight holders (4) 6. A ring 3. Pulleys (4) 7. A metal pin 4. Slotted weights 8. A protractor 9. Sheets of plain paper and graph paper Introduction A vector is a physical quantity that has both magnitude and direction. Examples include force, weight, displacement, velocity and acceleration. On the other hand, a scalar is a physical quantity that has magnitude only, examples speed, mass, distance, temperature, population. A vector may be represented by a letter example with a bar on top indicating the direction, or by a bold letter, example A . A vector A can be written as a sum of two vectors A x and A y along the x and the y-axis respectively, as shown . A x and A y are called the components of vector A and are given by : A x = A cosα A y = A sinα α (≤ 90 0 ) is the angle vector A makes with the x-axis.

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