# need write report on this experiment. I sent a sample of old report that will help you how to make it.

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need write report on this experiment. I sent a sample of old report that will help you how to make it.

need write report on this experiment. I sent a sample of old report that will help you how to make it.

Lab Report Activity number: 7 Title of Experiment: Uniform Circular Motion. Purpose of the Experiment: In this experiment we are required to find the force due to circular motion and then this force is used to find the gradient of the graph. The slope is then compared with its theoretical value and the error difference is calculated. The quantities measured in this activity are The constant radius R in (m) The value of the constant force (F=Mg) Mass of the bob in kg The number of revolutions. The time period T(s). We are required to maintain the force and radius constant and then find the time taken for the 30 revolutions and then time for one oscillation is calculated by dividing the time for 30 revolutions by 30. The introduction: The physicals assumptions made in the calculations are that there is no air resistance acting on the bob and the spring used in the experiment has the ideal spring constant. The force and radius are assumed to be constant during each observation. The bob should be rotated with the constant velocity in order to maintain the constant radius. In order to reduce the human reaction error the time for 30 revolutions is measured and then it is divided by 30 to find the time for one revolution. As the mass of the bob increases the time period also increases. This relation suggests that time is directly proportional to mass. The graph of tˆ2 (s) against M (kg) is plotted and the gradient of the graph is calculated. The radius is measured by the use of the radius indicator and to ensure that it remains constant during rotation, a small piece of tape is applied on the pulley so that bob touches the tape each time it rotates. The procedure: Set up the apparatus as shown above. As the main shaft is spun manually, the test mass will stretch the spring until the bob rotates over one of the radii indicators located on the base of the instrument. The centripetal force is then measured. Firstly, disconnect the spring from the spring and determine its mass by using the top pan balance. Recheck and realign if necessary that the bob is suspended over the 18 cm mark when not attached to the spring. The bob is then reconnected with the spring maintaining the radius equal to 18 cm and the force 700N maintained constant throughout the experiment. This force is measured directly by connecting a horizontal string to the bob and suspending weights from this string over the end pulley until the test mass is pulled over the same radius indicator when the bob is not rotating. Under this condition the suspended weight is equal to the centripetal force when the bob rotates at that radius. Measure the time for 30 revolutions and then find the value of T. Add 100 grams mass by putting a slotted 50 gram mass on each side of the bob, and continue adding it until the total of 300 grams has been added. Then produce a graph of T square vs M by using the data studio. Then sketch the linear fit through the required portion of the graph which will give you the gradient of the graph. .Results: The results indicate that the gradient of the graph is The measured slope of the line = 1.04 ±0.13 s²/kg And the calculated value for the force is 1.31 s²/kg The measured value is not equal to the actual value because of the human reaction error in time and maintaining the radius constant each time by rotating the shaft at constant speed. Conclusion: The accepted value of the measurement is 1.31 s²/kg. The measured value of the slope is 1.04 s²/kg. Therefore, the error difference calculated is 21.15%. The error difference is higher because of some human reaction errors in the experiment. In order to maintain the constant radius the velocity of the bob should be remain constant and there can be error during the measurement of time.

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