Doutilar Now determine the powers of z and x, i. Preparation The international system of units is known as SI units, and is based suxpension the seven units listed in Table 1. The bar must be suspended symmetrically in a horizontal position by two threads of equal length. AM 18 — Homework assignment 2: You will then determine experimentally the relevant exponents in the proposed blfilar, taking multiple, repeated measurements and doing a statistical analysis of the data. This rectangular bar contains holes equidistant from each other and two extra with equal masses of 1.
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This is done by suspending two parallel cords of equal length through the object examined. However, the approach taken for this experiment is to determine the moment of inertia of a drop by suspending the cords through the mass centre of bodies, obtaining an angular displacement about the vertical axis through the centre of mass by a sensibly small angle.
This rectangular bar contains holes equidistant from each other and two extra with equal masses of 1. Chucks are also in place to alter length of suspended wires.
In addition an enclosed-type measuring tape and weight balance were also used for the experiment. With the bar suspended by the wires, the length L was adjusted to a convenient extent and then distance, b, between the wires was measured.
The bar was then tilted through a very small angle about the vertical axis and time taken for 20 oscillations of the bar, was recorded. From this, the periodic time was also calculated. The length L was further adjusted and the time taken for another 20 oscillations was recorded.
Then step 3 was repeated but with different values of L 6. The length of the wire L was then fixed at a value and the time taken was recorded for 20 oscillations at varying distances x, between the two 1.
The rectangular bar was then detached from the apparatus arrangement and taken to weight balance in order to determine the mass of the bar. The internal diameters of the holes, the thickness of the rectangular were also measured. All measurements and data recorded were collated for experimental analysis. This also provides another approach to the determination of the moment of inertia of the body. In this situation the length of the wires are kept constant and the distances between the two equal masses are varied.
This is called the auxiliary mass method but for this experiment, our analysis would be on just the generic bifilar suspension approach. Where Io is the moment of inertia of the bored holes. Where Mo is the mass of the hole bored, Ro is the radius of each hole bored and X is the distance from each hole on either side to the centre of the rectangular bar.
Note the there are 15 holes bored, hence its introduction in equation 8 Therefore, Moment of inertia of the bar, I is.
BIFILAR SUSPENSION EXPERIMENT PDF