Grade 4 Do you agree with this alignment? That student can take brief notes of what the team is doing as they are working and then trace the pathway of the team on the flowchart based upon the notes taken. Lay down the cardboard down on a level surface and set up the flat piece of wood at one edge. An alternative experiment is to investigate how the height of each successive bounce changes. If we were to use a harder ball e. The ball bounced the lowed on grass because it is a very soft and spread out surface, so the tennis ball didn't have to use as much energy as it did with the concrete surface. One factor that can affect the basketball's collision with the ground is the type of surface the ball collides with.
Results table Table of results to show: The loss of energy Drop height m Average bounce height m Initial P. Another weakness of my investigation was the air resistance. It was also very easy to read the measurement incorrectly as it Is mid air which makes it very difficult to read at all never mind the bottom of the ball. From dropping the ball we can see how high the ball will bounce to after having a loss or gain of energy due to sound or movement of the ball as it hits a hard surface. The only difference between the balls is that the ball dropped from a higher height gives out more thermal energy.
Point out that there is a second column called Modifications. To ensure the accuracy of the results when averaging them any rogue or inconsistent results will be taken again. Grades 3 - 5 Do you agree with this alignment? Test 1: Ball Bounce Height Comparison The first time you drop the ball do not take a measurement, just watch where the ball goes so the next time the observer knows where to look. This help to greatly increase the accuracy of the experiment. After a few bounces, it stops bouncing completely.
Graph 2 completely undermined my original prediction, this was probably due to the lack of insight I gave to the results and formulas to make and justify my prediction. Evaluation While gaining my results from this investigation we made sure we observed carefully for any mistakes when dropping the ball. If there was more wind there would be a lower bonce height and vice versa. In the second results table showing the loss of energy, the energy loss decreases as the height decreases because there was less potential energy to start with. This means for the ball to reach terminal velocity the drag force has to be bigger and for the drag force to be bigger the ball has to fall faster so that more air particles hit the ball every second.
This means that we can approximately calculate the amount of energy that the ball conserves as it hits the floor and therefore the height to which it will bounce for any given height in a vacuum. I took the advice of my teacher to read the rubric and did improve on that criterion. However, if your are interested in the physics behind how balls bounce, the following principles apply: The ball begins at rest from height h with potential energy mgh, where m is its mass and g is the acceleration due to gravity. Working in pairs, they drop balls from a meter height and determine how high they bounce. Temperature will not affect the balls bounce either as the experiment will be conducted at room temperature, thus not allowing the floor to get cold and in doing so alter its affect upon the ball on impact. The ball that is not hollow will do the opposite.
A Fourth controlled variable will be the way I drop the ball. The weight and material of the ball will be kept the same throughout the experiment by using the same ball. The results are quite accurate to a degree, with the exception of the few anomalous results. Detailed reason for prediction The ball has more potential and kinetic energy when it is released from a greater height, making the ball bounce higher. For example, when you hold a basketball at waist level, it has some potential energy. Therefore the ball dropped from the higher height must give out more thermal energy in order to end up with the same amount of energy as the other ball. Depends from where you measure the heights.
It is also directly proportional to x, proving that my prediction was correct, in that changing the independent variable affects the dependent variable; as the height the ball was dropped from increased so did the height bounced. This would provide evidence on how the height from which the ball is dropped from affects the height to which it bounces without air resistance. Encourage the students to modify their question, expectation, or explanation as they continue their investigation. Successes: The experiment was a success because although the results obtained weren't precise to the nearest mm, they still gave measurements to the nearest cm which were used to conclude that a tennis ball will bounce the highest on the most hardest surface. I think this will happen because the potential energy is being converted to kinetic energy as it slows down and hit's the surface.
Chlorophyll green coloured pigment in leaves absorbs light and changes it into chemical energy, which is used to power all the chemical reactions that go on in a plant cell. Until 70cm because at this point the average bounce height was 53. It's not as smart as you are, and it may occasionally give humorous, ridiculous, or even annoying results! Alex Boorman Ph20 - - Aim: To find out what affects the height to which a ball bounces. The basis of every experiment is a question. As the ball is accelerating due to gravity, at 9.
Grades 3 - 5 Do you agree with this alignment? Background Playing a game of basketball can be great exercise, and one part of that workout comes from just dribbling the ball. Bouncing Ball Experiment Our simple experiment is to drop a ping pong ball weighed at 3 grams from a height of 1 metre then 90cm, 80cm, 70cm, 60cm, 50cm, 40cm and of course zero cm. Also the mass of the ball affects the chances of the ball reaching its terminal velocity. The three trials for each bounce height were quite similar indicating a good precision in my data. Materials Balls Ruler Instructions Your kit of materials contains three types of balls. If a ball reaches terminal velocity at 20cm from the floor when dropped from 2m, it will reach terminal velocity at 10cm from the floor when dropped from 1. To increase accuracy, you may repeat each test three times and divide by 3 to find an average.
The ball will dropped from increasing heights cm-25, 50, 75,100,125,150,175,200 and the bounce of the ball will be measured. Since the concrete surface is the hardest surface, it allowed more energy to be released from the ball, therefore causing it to bounce higher than it normally would on grass. This is because as the ball goes faster it passes through a greater volume of air each second. Some mathematicians focus on purely theoretical problems, with no obvious or immediate applications, except to advance our understanding of mathematics, while others focus on applied mathematics, where they try to solve problems in economics, business, science, physics, or engineering. The y- interpret that — 3. Grade 5 Do you agree with this alignment? They measure, record and repeat the process to gather data to calculate average bounce heights and coefficients of elastici. If you review those concepts, you will be better prepared for this experiment.