The Efficiency Of Bouncing Balls - tennis ball display-SAFEKA-img

The Efficiency Of Bouncing Balls - tennis ball display

by:SAFEKA      2019-08-15
The Efficiency Of Bouncing Balls  -  tennis ball display
The purpose of my survey is to find out the efficiency of golf, tennis, table tennis, rubber balls, tennis and baseball in the first bounce from a 90 cm high drop.If the quality of the ball is greater, then the rebound of the ball will be lower, which means that the efficiency will be lower, because once the ball hits the ground, the kinetic energy converted into gravity energy will not be able to push the ball higher than the ball with smaller mass.1.Determine the source of energy input for this experiment.
The source of energy input for this experiment is gravitational potential energy and thermal energy.The gravitational potential energy is because the ball is on the ground, and the heat energy passes the body's heat to the ball because the person contacts the ball.2.Determine the type of energy generated.The type of energy generated is kinetic energy, elastic potential energy, acoustic energy, thermal energy, and then gravitational potential energy again.
Kinetic energy, because when the ball falls, the ball converts the gravitational potential energy into kinetic energy.Elastic potential energy, because when the ball falls to the ground, the shape changes and the elastic potential energy is generated.Then when the shape is restored, the elastic potential energy is converted back to kinetic energy.
Again, the gravitational potential energy, because when the ball rises in the air, the kinetic energy is transferred back to the gravitational energy.The sound energy, because when the ball hits the ground, the vibrating object causes the surrounding medium to vibrate, resulting in the sound.The last is heat, because when the ball hits the ground and deform, it will rub the ground and create friction, resulting in heat.
3.
Define the term energy efficiency.
Energy efficiency is the ratio of useful energy output to input energy.This is usually expressed as a percentage.Another definition is that energy efficiency is a way to manage and curb the growth of energy consumption.
If something provides more services for the same energy input, or less energy input for the same service, then it will be more energy efficient.For example, when you replace an appliance (such as a refrigerator or washing machine) or an office device (such as a computer or printer) with more energy --The new device provides the same service but uses less energy.This can save you energy spending and reduce greenhouse gases entering the atmosphere.
4.
List the forms (if any) of wasted energy generated in this experiment ).In this experiment, energy is wasted in the form of thermal energy and energy.Heat energy, because the heat is not used, the sound energy, because the sound is not used.
5.
The method of improving experimental design is proposed.Use a higher pixel recording device so I can see the measurements on the ruler more clearly and accurately.When some people drop the object in a different way, let the same group member drop all the balls.
Keeping the ball for the same amount of time, because the heat transfer of a person to the ball affects the efficiency of the ball, which makes the test inaccurate.6.The reasons for the different efficiency of the ball are proposed.I think the efficiency of the ball is different because they are all different quality and the quality will affect the efficiency of the object.
If the object is heavier, it will add more weight, which will produce more friction, and more friction means less efficiency, but if it is lighter, it will produce less friction.Another reason I suggest is because they are all made of different materials.Different materials conduct heat from the friction, cause friction and produce different sounds, which means that the efficiency of the ball may be improved or reduced by the material.
Set up the device in the appropriate way.
Turn on the device, slide the lock screen, click on the camera and switch it to recording mode, then press recording to get the IPad ready for recording.While the IPad is recording snap and snap, don't push golf from the front of the ruler at 90 cm.Press stop on the recording screen.Watch a video of golf falling.Observe the height of the golf rebound height of 1st.
Record this result in the workbook under golf trial 1.Make sure the IPad can still record and press the record.While the IPad is recording snap and snap, don't push golf from the front of the ruler at 90 cm.
Press stop on the recording screen.
Watch a video of golf falling.
Observe the height of the golf rebound height of 1st.Record this result in the workbook in the second golf trial.Make sure the IPad can still record and press the record.
While the IPad is recording snap and snap, don't push golf from the front of the ruler at 90 cm.Press stop on the recording screen.Watch a video of golf falling.Observe the height of the golf rebound height of 1st.Record this result in your workbook under golf trial 3.
Now, calculate the average of the bounce height of a golf ball by adding all the measurements of the golf ball to the bounce height, and then dividing the answer by 3.Record this answer in your workbook under the golf average.Now calculate the efficiency of golf by dividing the average rebound height of golf by the initial drop height (90 cm) and multiply it by 100%.
Record this answer in your workbook with golf efficiency.Make sure the IPad can still record and press the record.While the IPad is recording snap and snap, don't push table tennis from the front of the ruler at 90 cm.
Press stop on the recording screen.
Watch the video of falling table tennis.
Observe the height of the rebound height of table tennis 1st.Record this result in your homework manual for table tennis trial 1.Make sure the IPad can still record and press the record.
While the IPad is recording snap and snap, don't push table tennis from the front of the ruler at 90 cm.Press stop on the recording screen.Watch the video of falling table tennis.Observe the height of the rebound height of table tennis 1st.Record this result in your homework manual for table tennis Trial 2.
Make sure the IPad can still record and press the record.While the IPad is recording snap and snap, don't push table tennis from the front of the ruler at 90 cm.Press stop on the recording screen.Watch the video of falling table tennis.Observe the height of the rebound height of table tennis 1st.
Record this result in your homework manual as the third trial of table tennis.Now calculate the average of the bounce height of table tennis by adding all the measured values of the bounce height of table tennis, and then dividing the answer by 3.Record this answer in your homework manual below the table tennis average.
Now calculate the efficiency of table tennis by dividing the average rebound height of table tennis by the initial drop height (90 cm) and multiplying it by 100%.Record this answer in your homework manual, recorded in the efficiency of table tennis.Make sure the IPad can still record and press the record.
While the IPad is recording snap and snap, don't push the tennis ball to 90 cm from the front of the ruler.Press stop on the recording screen.Watch the video of the falling tennis ball.Watch the height of the tennis rebound 1st.
Record this result in your homework manual, in tennis trial 1.Make sure the IPad can still record and press the record.While the IPad is recording snap and snap, don't push the tennis ball to 90 cm from the front of the ruler.
Press stop on the recording screen.
Watch the video of the falling tennis ball.Watch the height of the tennis rebound 1st.Record this result in your homework manual as a second trial of tennis.
Make sure the IPad can still record and press the record.While the IPad is recording snap and snap, don't push the tennis ball to 90 cm from the front of the ruler.Press stop on the recording screen.Watch the video of the falling tennis ball.
Watch the height of the tennis rebound 1st.Record this result in your homework manual as the third trial of tennis.Now calculate the average of the height of the tennis bounce by adding all the measurements of the tennis bounce height, and then dividing the answer by 3.
Record this answer in your homework manual below the tennis average.Now calculate the efficiency of tennis by dividing the average rebound height of tennis by the initial drop height (90 cm) and multiply it by 100%.According to the efficiency of tennis, record this answer in your homework book.
Make sure the IPad can still record and press the record.While the IPad is recording snap and snap, don't push the rubber ball away at 90 cm from the front of the ruler.Press stop on the recording screen.Watch a video of a rubber drop.Observe the height of the rubber ball 1st rebound height.
Record this result in your homework manual and try out the rubber ball in 1.Make sure the IPad can still record and press the record.While the IPad is recording snap and snap, don't push the rubber ball away at 90 cm from the front of the ruler.
Press stop on the recording screen.
Watch a video of a rubber drop.
Observe the height of the rubber ball 1st rebound height.Record this result in your homework manual for a rubber ball trial.Make sure the IPad can still record and press the record.
While the IPad is recording snap and snap, don't push the rubber ball away at 90 cm from the front of the ruler.Press stop on the recording screen.Watch a video of a rubber drop.Observe the height of the rubber ball 1st rebound height.Record this result in your homework manual and try out the rubber ball in 3.
Now calculate the average of the bounce height of the rubber ball by adding all the measured values of the bounce height of the rubber ball, and then dividing the answer by 3.Record this answer in your homework manual and average it with a rubber ball.Now calculate the efficiency of the rubber ball by dividing the average rebound height of the rubber ball by the initial drop height (90 cm) and multiply it by 100%.
Record this answer in your homework manual and record it in the efficiency of the rubber ball.Make sure the IPad can still record and press the record.While the IPad is recording snap and snap, don't push netball from the front of the ruler at 90 cm.
Press stop on the recording screen.
Watch the video of tennis.
Observe the height of the rebound height of tennis 1st.Under netball's trial 1, record this result in your Workbook.Make sure the IPad can still record and press the record.
While the IPad is recording snap and snap, don't push netball from the front of the ruler at 90 cm.Press stop on the recording screen.Watch the video of tennis.Observe the height of the rebound height of tennis 1st.Under netball's Trial 2, record this result in your Workbook.
Make sure the IPad can still record and press the record.While the IPad is recording snap and snap, don't push netball from the front of the ruler at 90 cm.Press stop on the recording screen.Watch the video of tennis.Observe the height of the rebound height of tennis 1st.
Record this result in the job manual under netball trial 3.Now, by adding all the measurements of the height of the tennis rebound, and then dividing the answer by 3, the average of the height of the tennis rebound is calculated.Record this answer in your homework manual.
Now calculate the efficiency of tennis by dividing the average rebound height of tennis by the initial drop height (90 cm) and multiply it by 100%.Record this answer in your homework manual, recorded in the efficiency of tennis.Make sure the IPad can still record and press the record.
While the IPad is recording snap and snap, don't push netball from the front of the ruler at 90 cm.Press stop on the recording screen.Watch a video of falling baseball.Observe the height of the rebound height of baseball 1st.Record this result in your homework manual as trial 1 for baseball.
Make sure the IPad can still record and press the record.While the IPad is recording snap and snap, don't push the baseball to 90 cm from the front of the ruler.Press stop on the recording screen.Watch a video of falling baseball.Observe the height of the rebound height of baseball 1st.
Record this result in your homework manual as the second trial of baseball.Make sure the IPad can still record and press the record.While the IPad is recording snap and snap, don't push the baseball to 90 cm from the front of the ruler.
Press stop on the recording screen.
Watch a video of falling baseball.
Observe the height of the rebound height of baseball 1st.In the third trial of baseball, record this result in your Workbook.Now, by adding all the measurements of the bounce height of baseball, and then dividing the answer by 3, calculate the average of the bounce height of baseball.
Record this answer in your homework manual below the baseball average.Now, calculate the efficiency of baseball by dividing the average bounce height of baseball by the initial drop height (90 cm) and multiplying it by 100%.Record this answer in your homework book with baseball efficiency.
Return all equipment and handle any garbage safely.You have finished the experiment now.My results show that the average rebound height (59 cm m) and efficiency (66% m) of table tennis are the highest, followed by tennis with an average rebound height of 54 cm m and an efficiency of 60% m, secondly, tennis with an average rebound height of 41 cm and an efficiency of 46%, followed by baseball with an average rebound height of 40 cm and an efficiency of 44%, followed by a rebound height of 24 cm, the rubber ball with an efficiency of 27%, then the last one, with a low rebound height of 23 cm and an efficiency height of 26%.These results are shown in my results table and figure.
My results suggest this happens because the higher the efficiency of the ball converting kinetic energy into elastic potential energy and reverting to kinetic energy from an energy perspective, the better it will bounce and the more energy it will loseSo my results further show that table tennis is better at converting kinetic energy to elastic potential energy and vice versa.Then tennis, then tennis, then baseball, then rubber, and finally golf.All the data in my table and chart can be used to explain what is going on as my table shows the average rebound height, rebounds and efficiency for each ball.
My chart also shows the efficiency of each ball.So, as I said before, all the data in my tables and graphs can be used to explain what's going on because they (especially tables) go through what's going on throughout the experiment, the basic step back shows what happened.I can see a pattern in my results that is displayed in my results table.
Each particular Ball's measurement of its bounce is very close in size, meaning that the specific ball that drops is usually (with some exceptions) with roughly the same bounce height and efficiency.A smaller pattern I can see is that efficiency is very similar in number to the average bounce height per ball.This is shown again in my results table and in the figure and is proven.
One possible explanation for these patterns is that the same ball usually has the same bounce height because, as I said, it is the same ball.Represents the same material, type of friction, etc.So this explains why there is a very similar measurement of the type of ball for each bounce height.
For the second size efficiency model similar to the average bounce height, it's just a coincidence and what it looks like.But another pattern of the same ball is that the bounce height is basically the same size, because it is the same ball.These results are shown in my results table and in the graph and are proven.
My results in the results table and in the graph can neither prove my hypothesis nor prove my rebuttal.But most of them are fake.My assumption is that if the quality of the ball is greater then the bounce of the ball will be lower, which means that the efficiency will be lower because once the ball hits the ground, the kinetic energy converted into gravity energy will not be able to push the ball higher than the ball with smaller mass.This is not proven because some of the heavier balls do have higher efficiency and higher bounce heights than some of the lower quality balls.
But this is not completely denied because the lightest ball, table tennis, is the ball with the highest efficiency and the highest rebound height.Let me show you further evidence of the results in relation to my assumptions.These are used balls, and their efficiency is from the highest to the lowest.
This also illustrates their quality.
Table tennis = 2.
7 GM, Tennis = tennis GM, Tennis = 59gm, baseball = 145gm, rubber ball = 24gm, Golf = 45gm.So in the end, my assumption is not entirely correct, but, yes, not confirmed, but the only thing wrong is tennis and golf.The rest are arranged in the lightest to heaviest Order of Mass.
I believe tennis and golf will not follow this because of their material.So I learned from it that efficiency and bounce height are not only related to quality, but also to materials.All in all, yes, my theory is not confirmed, but it is all about learning.
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