578 Words3 Pages

Pendulum Lab Conclusion In this experiment, we first tied a mass to a length of fishing line. We then set up a stand on which we could drape the mass over with relative stability. We used two fishing lines with the same length, but one with a 50g mass attached to it, and another with a 75g mass attached. We pulled both to the same height and released them simultaneously and observed their swinging motion in order to determine whether or not mass had an effect on the period of a pendulum—since both masses swung at the same rate, mass had no effect on the period of a pendulum. We removed one of the fishing lines, and timed how long the pendulum would take to swing back and forth ten times (ten periods). We chose to time it for ten periods rather than one because the data would be more reliable and consistent. After recording this time in our data table and dividing by the number of times we allowed the pendulum to swing (ten) to find the period, we repeated this process four more times, each time with a different length of string. We recorded the length and period for each of the five trials. Through both qualitative observation, and our quantitative data, we deduced that the shorter the length of a pendulum, the smaller its period. At the longest length 42cm, the period was 1.33s. Each progressing length: 33.5cm, 30cm, 22cm, and 11cm yielded smaller and smaller periods of 1.16s, 1.15s, 0.96s, and 0.68s respectively. In our first graph of Period vs. Length, we plotted the points and discovered that it formed a root curve. In our second graph, Period2 vs. Length, as we plotted the points, we discovered that the graph had become linear—this graph would also be able to find the length for any period. Both graphs consistently confirmed that the period of a pendulum is proportional to the root of its length. When we were given the equation to find the

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## Standing Waves Lab Report

329 Words | 2 PagesFor first harmonic, our wavelength was 1.200 m, found by the formula λ=2L/n. In the second part we used tension and velocity to find mass density. For the first notch, with a tension of 10.3 N, the velocity was 86 m/s with a overall mass density of 0.018. Discussion In the lab we wanted to find the frequency at which resonance occurs on a stretched wire as well as look at the relationship between the frequency of vibration and tension and linear mass density of the wire. For the first procedure, we increased the frequency until we found resonance, and recorded frequencies and nodes to calculate wavelength.

## Ballistics Pendulum Essay

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## Experiment 8: Ballistic Pendulum

682 Words | 3 PagesDiscussion: In this experiment, a spring trigger launches a steel ball, acquiring a certain initial velocity. Then the ball collides with a wooden block, and together they reach a specific angel at height (Δh), called the angle indicator, and a final velocity. Our angle indicator reading was 0 degrees when the pendulum was hanging freely. Because of this, the maximum angel found from the collisions is easier to calculate, since we do not need to subtract the amount the pendulum is off from 0 degrees. After finding the initial estimate of the maximum angle, we loaded the launcher again and set the angle indicator to 3 degrees less than the angle reached in the previous step.

## Compound Pendulum Essay

2290 Words | 10 Pages6) The procedure was then repeated for larger values of h, until T has passed its minimum value. (A smaller moveable knife edge must be used for values of h, as the axis of suspension lies on the narrow strip region of the pendulum) 7) A graph of T against h was then plotted and the value of h at which the period reaches a minimum should be estimated. 8) A graph of hT2 against h2 was then plotted and analysed to obtain a value for g. As a means of obtaining the value for g, the results were used to produce a straight line graph and the gradient of the graph used to find the value of g. The period of the pendulum is given by; T=2πω=2π(k2+h2)gh Squaring both sides of this equation gives; T2=4π2ghk2+h2 This re-arranges to give; hT2=4π2g×h2+4π2g×k2 Which is the form y=mx with y=hT2,

## Buoyancy Lab Essay

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## Lung Capacity Experiment

328 Words | 2 PagesConclusion The purpose of this experiment was to see if your age mattered in how much lung capacity you would have. By measuring the distance around the balloon we would identify who has more lung capacity. My hypothesis was that I thought the older or younger you are the less lung capacity you have. Example- a one year old can’t blow a balloon as well as a ten year old yet a ninety year old can’t blow ass well as a ten year old to. My hypothesis was incorrect because we did the results of the data and did three different age groups which were: five through ten years old, twelve through twenty years old, and from thirty - nine through forty - three years old.

## Physics Lab Report Circular Motion

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## Pendulum Physics Prac

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## Exercise 31- Statistics

1112 Words | 5 PagesThe total risk score is 4.14, the greatest relative or standardized difference between pretest and 3 month outcomes. This t ratio has a statistical significance of 0.05 - the least acceptable value for statistical significance. Also the larger the t ratio, the smaller the observed p value and increased odds of being able to reject the null hypothesis. 3. Which t-ratio listed in Table 3 represents the smallest relative difference between the pretest and 3 months?

## Exercise 31 Essay

807 Words | 4 PagesWhat does this result mean? The t ratio of -0.65 represents the smallest relative difference between the pretest and 3 months outcomes. This ratio does not have an asterisk next to it in the table which according to the footnotes the asterisk is said to represent p < 0.05 the least stringent acceptable value for statistical significance. 4. What are the assumptions for conducting a t-test for dependent groups in a study?

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