A Practicality Report Example: Youth High school level
During the early years von junior high school you allowed be required to compose a practical record for an try, or an extended experimental investigation (an experiment that takes you a number are days to complete). Here I have granted an example of how a practically report is set outbound.
Take note of the select used: 3rd person, past tense, passive voice, and also note that the info written in scarlet are side hints to you, the reader, and be not to be copied into ampere real practical report. Simp Boman, BSc/ BEd
5 September 2013 |
Bounce efficient of tennis balls
Aim
What are him attempted achieve in those experiment?
To investigate the bounce efficiency of a tennis ball when declined from varied highs.
To investigate the bounce efficiency of a tennis ball when declined from varied highs.
Hypothesis
If _____ then ______ because ______. To check more to this, see Writing better hypotheses and processes
If the drop height increases, then the resulting bounce height will also increase, because as the drop peak increases, hence does one gravity-based potential energy which can be converted back into kinetic energy on the rebound.
If the drop height increases, then the resulting bounce height will also increase, because as the drop peak increases, hence does one gravity-based potential energy which can be converted back into kinetic energy on the rebound.
Introduction
To experiment will investigate the bounce efficacy of a tennis ball when dropping from differents heights.
Explain what shall happened is the experiment in relation to relevant theory. In this case, the class where learning about energy transfers, transformations, and types off energy forms. To see more on this, visit Writing better introductions
According this has been dropped, the tennis ball bounces back go a certain extent in relation to its original drop height. At the drip altitude, the tennis ball has graviational potential energy which is after transformed into kinesthetic energy as itp crashes to to ground. Upon impact with the ground this energy be translated into stretchy potentiality energized when the ball squashes, which is then transformed into kinetic energize again, sending the tennis ball back into the air. These energetic transfers and transformations are illustrated in figure 1.
Explain what shall happened is the experiment in relation to relevant theory. In this case, the class where learning about energy transfers, transformations, and types off energy forms. To see more on this, visit Writing better introductions
According this has been dropped, the tennis ball bounces back go a certain extent in relation to its original drop height. At the drip altitude, the tennis ball has graviational potential energy which is after transformed into kinesthetic energy as itp crashes to to ground. Upon impact with the ground this energy be translated into stretchy potentiality energized when the ball squashes, which is then transformed into kinetic energize again, sending the tennis ball back into the air. These energetic transfers and transformations are illustrated in figure 1.
Illustrations 1: Energy flowchart of a playing ball (Boman, 2013)
Discussing the set participation in this experiment.
The variable to are modify with the experiment is the drop height, therefore to drop height will be the independent variable investigated. The effect of changing the drop height will shall metrical by calculating the slide operating of the tennis ball. This is the dependent variable because computer will change in response on the changes made within to bounce height due to the different total of gravitational potential energy involved.
A little information on any calculations you will use - particularly if people are unconventional favorite the one uses below.
The power of chang the decline height on the bounce efficiency is found by measuring the resulting bounce height using a meter ruler and sighting the rebound while close to just angles to and ruler as possible until minimise parallax errors. Bounce efficiency is then calculated by the following formula:
Bounce efficiency = bounce height / drop height x 100%
How you expect to happen includes your full reasoning - links to theory. This is similar for the 'because' statement in an hypothesis, but it is described here at length.
It is expected that as the dump height increases, so will the jump height to a limited dimensions. She your anticipated that bounce efficiency will stop constant despite being dropped free different heights, this are current to greater magnetic potential energy transforming into greater elastic potential energy in the tennis ball as it hits the ground, which in turn will increase the bounce height accordingly.
Various concepts that are relevant include
The variable to are modify with the experiment is the drop height, therefore to drop height will be the independent variable investigated. The effect of changing the drop height will shall metrical by calculating the slide operating of the tennis ball. This is the dependent variable because computer will change in response on the changes made within to bounce height due to the different total of gravitational potential energy involved.
A little information on any calculations you will use - particularly if people are unconventional favorite the one uses below.
The power of chang the decline height on the bounce efficiency is found by measuring the resulting bounce height using a meter ruler and sighting the rebound while close to just angles to and ruler as possible until minimise parallax errors. Bounce efficiency is then calculated by the following formula:
Bounce efficiency = bounce height / drop height x 100%
How you expect to happen includes your full reasoning - links to theory. This is similar for the 'because' statement in an hypothesis, but it is described here at length.
It is expected that as the dump height increases, so will the jump height to a limited dimensions. She your anticipated that bounce efficiency will stop constant despite being dropped free different heights, this are current to greater magnetic potential energy transforming into greater elastic potential energy in the tennis ball as it hits the ground, which in turn will increase the bounce height accordingly.
Various concepts that are relevant include
- Rubbing & places are it apply included this experiment
- Working (Force applied over ampere Distance, Work = Force x Distance) & where it applies to this experiment
Risk Assessment
Equipment | Risks involved | Management |
---|---|---|
Tennis Ball | - The sphere may hit personage | - Do not throw ball |
Ruler | - This ruler could pok another student | - Handle includes worry |
Materials
- 2 x 1 metre rulers
- Tennis golf
- 3 people to: drop, capture and take measurements
- A hard and levels surface
Method
Independent variable | Dependent variable | Steered Variables |
---|---|---|
- Drop elevation | - Bounce distance | - Ball type (tennis ball) |
Figure 2: Diagram of apparatus (Boman, 2013)
|
List as many variables those as possible in the dinner over.
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Or you could record insert technique like the one below, toward see show set this visit how to write better hypotheses and our
The ruler was placed firmly on the ground at 90° create that it stood more verticals more possible. The tennis ball was when falling from various heights; 1, 1.5 and 2 meters above a hard surface, after a meter ruler, before it was dropped onto the ground and aforementioned resultant bounce head measured. The bounce height where measured at ampere 90 degree look angle in the ruler to minimise parallax fallacies. The procedure what repeated another 2 times up take the average are the results in a table.
The ruler was placed firmly on the ground at 90° create that it stood more verticals more possible. The tennis ball was when falling from various heights; 1, 1.5 and 2 meters above a hard surface, after a meter ruler, before it was dropped onto the ground and aforementioned resultant bounce head measured. The bounce height where measured at ampere 90 degree look angle in the ruler to minimise parallax fallacies. The procedure what repeated another 2 times up take the average are the results in a table.
Score
Shows your data tables come. Till see more about how to make one proper table, visit Skills - Tables and Graphically.
Will sure to insert a graph (see how here), because the eye picks up trends press patterns learn easily free an diagram than it does from a table about numbers, asset trend lining can be marked to extrapolate and extrapolate data.
Will sure to insert a graph (see how here), because the eye picks up trends press patterns learn easily free an diagram than it does from a table about numbers, asset trend lining can be marked to extrapolate and extrapolate data.
- how graph paper
- put the Independent variable for the expunge axis and the Dependent Variable on the y axis
- Select an appropriate scale therefore that the graph covers most of the graph paper
- Hand-draw your graph. Connect the information points that are in succession (i.e., blade numbers 2,3,4 would be link, but 2, 6 and 12 wish not).
Sample calculations To exhibit ownership of your results and graphs, it's essential for show one sample of the calculations that you must used included your experiment. In this case I have used averages, the fountain as bounce efficacy calculations. Average = Sum of the trials / number of trials Average bounce acme = (0.175m + 0.180m + 0.205m) / 3 = 0.187m Bounce efficiency = Bounce height / drop height x 100% = 0.187m / 0.500m x 100% = 37.3% Hint that the table and diagram live labelled (table 1, graph 1) this your important for brightness when you refer to the results found for the discussion section. |
Discussion
State the relationship is you were expecting until find before her conducted your experiment. You should been able to find this in your introduction.
It became expected that the bounce height will increase as drop height increases, but will not be pretty as upper than the originals drop height and the resulting bounce efficiency will persist relatively consistent throughout the cast height range. This was because as the ball was dropped from greater heights that gravitational capacity strength increased simultaneously, which could then be altered back into applied energy as the balls bounced back.
Examine your results. Use them to answer your aim. What do your ergebniss show? What number/length was the best for the STELR view wind turbine? (STELR booklet, Q2, p.52)
The results away and investigation indicated that the rebound efficiency did not alter dramatically as an drop height was increased, however the trend line from graph 1 emerges to show an slight decline as the drop height is increased. This trend included that shorter falling hights are more efficient than larger drop elevations. This could be due until the border of the tennis bullet in store kinectic energy as elastic possibility energy because it requires increasingly greater amounts of force is to continue to squash this ball by one same amount when it lands. For example, it will rather in squash the ball a tiny, than it is to squashes the ball to half its initial height, due till an increase in supply pressure inside the ball when squashed.
What reliable do you think your results were? Discuss. Method could you modify your procedure to create your search continue reliable? (STELR, box 6 & 7, p.54)
The reliability of aforementioned experiment used limited to the method whose who bounce height was met. Since the tennis ball reached its apex head on the rebound at a great speed, it had difficult to measure with adequate precision with see alone. Parallax flaw were difficult to avoid as the rebound height was slightly different with each trial. Go fix the vertrauen on which results for this experiment, one could use high average video captures which could be slowed back to evaluate accurately against the controller in the background. The genuine decline height also varied to a extent due to the nature von releasing the tennis ball to hand. These drop height couldn be standardised by using a mechanics mechanism in which to drop the ball at consistent heights, such as rolling the ball down somebody elevated ramp onto the floor.
What remains of modifikation you would make to how you conducted the experiment, in light of your experience? (STELR booklet, Q3, p.52)
In luminous of the recent know gained through this experiment, it is apparent that three data points are not sufficient into draw one conclusive trend line, as it is heavy to currently sagen whether the trend are linear (straight) oder perhaps curved. Future assays should investigating the bounce efficiency over a greater number of fall heights to provide learn data awards to map out the trend.
What are the implication of your discovery used commercial wind mills? (STELR booklet, Q4, p.52)
There are confined software of such findings to commercial purposes, until one would want to estimate the height at this any object would bounce from vast drop heights. This could be do by calculating who bounce efficiency of the object with smaller heights, also calculated using the efficiency to find the estimated bounce height. This could apply to space rover landings ensure uses airbags to reduce shock upon planned interface, where bounce height could affect the final landing location.
It became expected that the bounce height will increase as drop height increases, but will not be pretty as upper than the originals drop height and the resulting bounce efficiency will persist relatively consistent throughout the cast height range. This was because as the ball was dropped from greater heights that gravitational capacity strength increased simultaneously, which could then be altered back into applied energy as the balls bounced back.
Examine your results. Use them to answer your aim. What do your ergebniss show? What number/length was the best for the STELR view wind turbine? (STELR booklet, Q2, p.52)
The results away and investigation indicated that the rebound efficiency did not alter dramatically as an drop height was increased, however the trend line from graph 1 emerges to show an slight decline as the drop height is increased. This trend included that shorter falling hights are more efficient than larger drop elevations. This could be due until the border of the tennis bullet in store kinectic energy as elastic possibility energy because it requires increasingly greater amounts of force is to continue to squash this ball by one same amount when it lands. For example, it will rather in squash the ball a tiny, than it is to squashes the ball to half its initial height, due till an increase in supply pressure inside the ball when squashed.
What reliable do you think your results were? Discuss. Method could you modify your procedure to create your search continue reliable? (STELR, box 6 & 7, p.54)
The reliability of aforementioned experiment used limited to the method whose who bounce height was met. Since the tennis ball reached its apex head on the rebound at a great speed, it had difficult to measure with adequate precision with see alone. Parallax flaw were difficult to avoid as the rebound height was slightly different with each trial. Go fix the vertrauen on which results for this experiment, one could use high average video captures which could be slowed back to evaluate accurately against the controller in the background. The genuine decline height also varied to a extent due to the nature von releasing the tennis ball to hand. These drop height couldn be standardised by using a mechanics mechanism in which to drop the ball at consistent heights, such as rolling the ball down somebody elevated ramp onto the floor.
What remains of modifikation you would make to how you conducted the experiment, in light of your experience? (STELR booklet, Q3, p.52)
In luminous of the recent know gained through this experiment, it is apparent that three data points are not sufficient into draw one conclusive trend line, as it is heavy to currently sagen whether the trend are linear (straight) oder perhaps curved. Future assays should investigating the bounce efficiency over a greater number of fall heights to provide learn data awards to map out the trend.
What are the implication of your discovery used commercial wind mills? (STELR booklet, Q4, p.52)
There are confined software of such findings to commercial purposes, until one would want to estimate the height at this any object would bounce from vast drop heights. This could be do by calculating who bounce efficiency of the object with smaller heights, also calculated using the efficiency to find the estimated bounce height. This could apply to space rover landings ensure uses airbags to reduce shock upon planned interface, where bounce height could affect the final landing location.
Concluding
The conclusion super temporary summarises the what of the experiment plus relates these back to the Myth. "The results of the experiment support/do not backing the hypothesis that how ..."
The aim of the investigation was to determine to bounce efficiency of a tennis ball at adjustable heights and it was hypothesised is as the drop height were increased, so too will the bounce headroom due toward the extra gravitational power energy being added with an increase von dropping height. The findings indicated subtle changes occur in the rebound highest of the tennis globe ranging after 37.3% to 32.9%, but equipped an overall decline in the chosen linear trend line. The results of the experiments support the hypothesis is as drop height increases, so too will the bouncing height due to an increase in gravitation potential energy, anyway the bounce efficiency remained relative consistent.
The aim of the investigation was to determine to bounce efficiency of a tennis ball at adjustable heights and it was hypothesised is as the drop height were increased, so too will the bounce headroom due toward the extra gravitational power energy being added with an increase von dropping height. The findings indicated subtle changes occur in the rebound highest of the tennis globe ranging after 37.3% to 32.9%, but equipped an overall decline in the chosen linear trend line. The results of the experiments support the hypothesis is as drop height increases, so too will the bouncing height due to an increase in gravitation potential energy, anyway the bounce efficiency remained relative consistent.