Furthermore stands can be fixed on the table to prevent them from falling.Galileo claimed that all objects fall toward Earth with the same acceleration. To deal with this problem student should always wear closed shoes in the lab while carrying out their experiments. Injuries on the legs resulting from falling stands from the table, some stands are heavy and if they fall from the table to the ground they can injure student's legs if they are wearing open shoes or sleepers. * To find the period T, the time value for the 10 swings was divided by 10.
* Step five and six was repeated eight times with different lengths of the string in every measure setup. This was done to eradicate anomalous results. * The experiment was repeated without changing any measurement the average of the readings was recorded. Using several complete oscillations is advisable because it minimizes the errors that arise due to reaction time when starting and stopping the timer. The displacement should be large, mainly from 10 degrees and above this will reduce the error while calculating g using the formulaT=2Ï€L/g (Psillos & Niedderer, 2002). How long it takes to make 10 complete swings was measured and recorded. * The pendulum was pulled away from the vertical to an angle of 10 degrees, the protractor was used to measure this angle, when it is exactly 10 degrees allow it to swing, the moment it is allowed to swing the stopwatch was started. The length is the recorded in the table for the first data set. * The length of the string is measured from where it is leaving the wooden blocks to the middle of the suspended mass. * The mass object was tied on the other end of the string the mass should be in a position of swinging freely. * The blocks were put together with the string between the two blocks and they were squeezed together using the clamps jaws.
#Measuring acceleration due to gravity lab report free
The mass suspension should be friction free so that wood blocks are the used to provide string suspension. * The clamp was attached to the ring stand so that it can freely hold the string. Two small pieces of wood that can be closed in the jaws of the clamp The apparatus used in the experiment include When several measurements of T2 are graphed with different values of L we shall be in a position of experimentally determining the constant of proportionality and acceleration due to gravity g. From the formula it implies that T2 should be proportional to L and constant of proportionality is 4Ï€2/g. The relation between the length and the period is given by the formula T=2Ï€L/g whereby T is the period of oscillation, g is the gravitational force, and L is the length of the string (Psillos & Niedderer, 2002). It is then suspended using a stand the mass is the released with an angle to the vertical and the mass will then make oscillation in a plane. It is made up of a mass m suspended using a string of a certain length. A simple pendulum is a simple experiment that can be easily performed in a lab by students. In this experiment we shall measure the force of gravity g using a simple pendulum.
In a situation where there is no air resistance for example in a vacuum two different objects of different masses for example a paper and cannonball when released from the same height they will hit the ground at the same time. Acceleration due to gravity is involved in the oscillation of the mass the universal accepted g is 9.8 ms2.įor over a long period of time, acceleration due to gravity has been known to be constant irrespective of the mass of the object (An OER from Textbook Equity, 2014). The time it takes to complete one oscillation does not depend on the suspended mass or the angle to the vertical in which the mass is released. Well known scientist Galileo was the first person to observe that the time taken by a simple pendulum to swing to and fro over a certain distance depends only on the length of the string that is attached to the mass (Muncaster, 2003). Such kind of oscillatory motion is known as simple harmonic motion. The movement of the pendulum suspended material represents period motion that was used long time to measure time (Muncaster, 2003). An example of such thing is a simple pendulum. In nature several things wiggle in periodic fashion, in other words they vibrate. By drawing a graph using the values of T2 and L and using the formula T=2Ï€L/g we found that the acceleration due to gravity is 10.39 ms2. For different lengths and fixed angle, evidence of a linear relationship between period T2 and length L is observed. In this experiment the time of 10 oscillations of different lengths of a string attached to the suspended mass was measured, the angle in which the pendulum was left to swing was kept constant. Determining gravity acceleration using a simple pendulum
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