Bouncing ball physics is an interesting subject of analysis, demonstrating several interesting dynamics principles related to acceleration, momentum, and energy. A lot of them bounce. Note that the table and graphs are labelled (table 1, graph 1) this is important for clarity when you refer to the results found during the discussion section. 4. A perfectly inelastic collision has a coefficient of 0, … Repeat steps 3 and 4 but change the drop height to … The tennis ball bounced the highest on the concrete surface because it was the most hardest surface, forcing the tennis ball to release more elastic potential energy, and therefore making it bounce … The key is stored energy. The ball’s initial height was recorded from the base of the ball at a given height; while observing videos after data collection, the ball’s rebound height was recorded, and then divided by the initial height to calculate the rebound percentage. Learn about the conservation of energy at the skate park! Repeat the procedure for 40 cm and 60 cm. Materials: “Superball” or other balls, wall made of cinder blocks or bricks, (meter stick - optional) Procedure: 1. These principles will be discussed. Record the drop height and bounce in centimeters in the table below. Background. By carefully choosing the relative masses of the balls, it is possible to send the top ball flying many times higher than the distance it fell. Other hands-on activities to practice the use of the metric ruler. Graph your results by placing the drop height on the horizontal axis and the bounce height on the vertical axis. The standard height for most drop tests relies on the weight of the item being evaluated and the standards used for testing. 4. Drop the ball and let it bounce back up once. Repeat this process for each height. This is because the higher the starting height of the ball, the higher the ball’s potential energy. For Teachers 9th - 12th. For Trial 1, hold the ball at a height of 40 cm, drop the ball carefully and observe the bounce height. Analyze frame-by-frame as shown at the start of lab. Record the bounce height in the data table. GPE (J) = ball mass (kg) x drop height (m) 5. Everyone willrecord the bounce height on the data chart in the Triall box. 1. In the first part of the lab. (Position the Motion Detector above the ball.) 3. If there is too much variation in these two measurements, take a third measurement. Procedure. Ser up the drop plate so that it is 20 cm above the bounce … The coefficient of restitution (COR), also denoted by (e), is the ratio of the final to initial relative velocity between two objects after they collide.It normally ranges from 0 to 1 where 1 would be a perfectly elastic collision. My hypothesis is that if the ball is dropped from a higher height, the rebounce height will also increase and if dropped from a lower height, the rebounce height will decrease as well but that the ball will never bounce back to the exact same height considering full elastic collision is not possible in the real world and energy will be lost once the tennis ball hits the ground. * Adapted from a lab written by Jim Ryan, State Center Community College District, Clovis Center, Clovis CA. When a ball bounces up and down on a flat surface, the maximum height it reaches decreases from bounce to bounce. drop of bodies from small height [10-12]. Measure the height after two bounces. The steepness of this “climb” will depend on the horizontal velocity. Drop Height (cm) GPE =mass x 9.8m/s 2 x height Drop 1 Drop 2 Drop 3 Drop 4 Drop 5 Average Bounce Height (cm) 40 50 60 70 80 90 100 Discussion Questions (use complete sentences): 1. Experienced educators and curriculum specialists have developed each of these lessons, and we have tested them in real classrooms. Hold the band tight at the top of the yardstick, and simply let Barbie drop from the head-down position you see above. (___ out of 3 points) 7. The Egg Drop Interactive provides a virtual egg drop activity. Average bounce height = (0.175m + 0.180m + 0.205m) / 3. In video analysis, you will drop an object while videotaping it; you need to have a known distance or measuring instrument in the frame of the video. Repeat this procedure at least five more times. For example: Drop is very round ZDrop broke apart _ Drop is surrounded by little splatters 9. (i.e. 3. According to the USTA regulations ball is tested for bounce by dropping it from a height of 100 inches (2.54 m) onto ; a bounce between 53 and 58 inches (1.3462 - 1.4732 m) is acceptable One problem; the linear relation between drop height and rebound height doesn't work if the height … a. GPE = ball mass x drop height 5. 4. make a data table for the averages. SPRING BOUNCE (Jan 2008, Nov 2009) When a ball bounces, the force on the ball increases to a maximum when the ball compression is a maximum, and then drops back to zero at the end of the bounce period. Measure the maximum height of the first bounce. Draw a graph of your results (Rebound Height vs. Drop Height). class time: 5 to 40 min. Calculate the change in height and potential energy. Answer: Drop height was the independent variable and bounce height was the dependent variable in the "Drop and Bounce" lab experiment.. 5. Drop the ball and let it bounce back up twice. There’s no denying it, the Fresh Foam More v3 (or FFMv3) is nearly the spitting image of its much more popular little brother (RTR Review), just much, much bigger as it has 3mm more heel stack and 7mm more forefoot stack and is a 4mm drop shoe vs the 8mm drop 1080 . bouncy ball (drop height vs. Additionally, the type of test can vary by item and desired outcome. Almost everybody, at some point in their lives, has bounced a rubber ball … 7. The height to which the ball bounces is to be estimated as carefully as possible. 4.4 oz. The range was from 200 centimetres to 20 centimetres, measured at 20 centimetre intervals. The purpose of this lab is to examine the relationship between the energy lost on a bounce and the starting height of the ball . In fact, the maximum height decreases in a very predictable way for most types of balls. Person #1isgoing to drop their ball from the 100cmmark, and the rest ofthe team will observe itsbounce height. Repeat trial 4 more times 9. In general, the coefficient of restitution decreased slightly as the drop height increased, but only a slight amount. The ball would bounce about the same height for those large drop heights. A person was required to drop the ball at certain heights: 20-200 cm, in increments of 20 cm. Catch it after one bounce. Determine the height of the drop and the bounce by measuring from the bottom of the ball. The standard bounce required shall not be less than 22cm nor more than 25cm when dropped from a height of 30.5cm on an approved table.’ The specifications for the rebound height can be 4. 4. 5. ... Mass of Ball v.s. Rebound height: This will be calculated from the initial bounce for each psi level. Energy Loss on Bounce. Bounce Height (cm) Drop Height (cm) GPE= mgh Drop 1 Drop 2 Drop 3 Drop 4 Drop 5 Average Bounce Height (cm) 40 50 60 70 80 90 100 Graph: Label the x axis and y axis and plot data. bounce height. The students will then use the ball to discuss energy conversions. But in terms of energy, it's all legitimate. For each drop height, write a description of the splatter in the data table. 3. Drop the golf ball from the same height 5 times, record the rebound height after the ball hits the floor. = 0.187m / 0.500m x 100%. Drop the ball. The experiment should be done near a cinder block (or brick) wall so that the distances can No matter the angle of impact, balls with the same vertical velocity will bounce to the same height in the same time on the same court. Welcome to PF! And if the height is 1/2 the first time, it will be 1/4 the second time, 1/8 the third time and so on. Do the video analysis experiment with at least two different objects freely falling. Start recording and drop the ball. Bounce Height (cm) Drop Height (cm) GPE= mgh Drop 1 Drop 2 Drop 3 Drop 4 Drop 5 Average Bounce Height (cm) 40 50 60 70 80 90 100 Graph: Label the x axis and y axis and plot data. The primary fact we will be using in part I is that the slope of a velocity vs. time graph is acceleration. = 37.3%. For each drop height, calculate the ratio of the average rebound height to the drop height and record your calculations in the data tables. Drop Height vs. Average Bounce Height The ‘bounciness’ or ‘bounce factor’ of a ball can be determined by comparing the ball’s rebound height to the original height from which the ball was dropped. 3. 1. Record the height to which it rises. Each additional drop of the ball should reduce the uncertainty in our measurements. 5. The coefficient of restitution (COR) for … Older students can even calculate the ratios of bounce height vs. drop height and observe if this ratio is consistent at all drop heights. Explanation: Whenever you perform a physics experiment as the "Drop and Bounce" lab experiment, you will face the variables that affect the results in here the drop height is independent because we change the height of the drop every time … Drop the ball 4 more times from 40 cm, recording the bounce height each time, for a total of 5 drops. Measure its height. Since you could only estimate the height of each apex to the nearest 0.05 meters, you should express the value for your experimental “g” to only two decimal places. I also observed many things in the lab. Students use a motion detector to collect data on the ball as the ball bounces... Get Free Access See Review. When a spring bounces on its end, the force remains constant in time while a compression wave travels up to the top end, reflects, and travels back … If the tennis ball and baseball are dropped from the same height, then the tennis ball will bounce higher because it has more elasticity which means it can store elastic energy better allowing more kinetic energy to be released. Average the results of the five trials. Record all data. Summary of Results. Collect the data, and visualize it on a graph. Ranking Tasks 2: The four graphs below are possible bounce height vs. drop height for the same ball dropped from several different heights. we will be dropping balls and measuring their final position. = 0.187m. In groups of three, students drop one ball from eight different heights and record the bounce height (to the nearest centimeter) for each drop. Drop the ball from a given height and measure the height to which it bounces. Since drag is proportional to the velocity squared, it's a small effect. budget: $0.00 to $12.00. Dangle measuring tape from wall/ ledge3* such that 0 m is at the ground and 4 m is at the holder position 5. The variable in my experiment is going to be drop heigt because I do not have the knowledge or the resources to do the other variables. In physics, the “bounciness” of a ball is defined as the coefficient of restitution. Whether it is a basketball bouncing on the ground, a tennis ball bouncing off a racket or pool balls bouncing off one another, the bounce can be seen as a … prep time: 0 to 5 min. In part II, we will be using the kinematic equation (in the vertical direction): v2 yf = v2 y0 +2aΔy (1) (1) v y f 2 = v y 0 2 + 2 a Δ y. Procedurally speaking, we will be performing this lab … Repeat that height two more times. Instead of throwing a ball upward, drop a ball and have it bounce on the ground. Learn how the height a ball is dropped relates to how high it bounces. We did 3 different records of how high the ball bounces for all 3 balls for all 8 heights. We noticed that as we dropped the ball from 25 cm to 200 cm, that as the drop height increases, the bounce-height increased as well. This proves that a ball's gravitational potential energy is proportional to its height. Cushioning: Moderate Drop: 8mm What we like: Incredible fit and comfort for long distance efforts. Rank in order from most likely to least likely that you think the graph that you will make in this lab will look like. Measure the speed and adjust the friction, gravity, and mass. Purpose The purpose of this lab is to find the mathematical relationship between the height from which a round object is dropped, and the speed at which it travels when it reaches the ground. Use your graph to predict how high the golf ball would have bounced if you had dropped it from 120 cm. For multiple bounces, it's just like dropping the ball again from a reduced height. Bounce efficiency = Bounce height / drop height x 100%. Clearly label the axes as Drop Height and Rebound Height. This coefficient is always less than 1 (unless you have flubber ). Drop the golf ball from the same height 5 times, record the rebound height after the ball hits the floor. Plot the Drop Height on the horizontal (input or independent variable) axis and the Rebound Height (output or dependent variable) on the vertical axis. But since the rebound height depends on the drop height, the rebound height is … Welcome to PF! This value does not play a role in any of the calculations, but is valuable to provide a uniform height for each level. The efficiency consistently declines as the drop height increases, as can be seen from the graph above, which shows negative slope for the trend line. Be sure that the bottom of the ball?not the top?is at the 6-feet line when you drop it. The egg drop is simulated and the result is displayed. Lesson Planet. • Set up the bounce plate so that it is 20 cm above the table. ... here is a plot of bounce height vs. bounce number for a small metal ball bouncing on my lab table. Objective: You will determine the energy transformations in two different kinds of bouncing balls by collecting and analyzing drop height and bounce height data. … Explain why this happened. Lab 1 Bouncing, Regression, and Analysis Objective: The goal of this lab is to introduce you to various lab and analytical skills that youll use throughout the year. The independent variable is the dropping height H because I choose it. Estimate the bounce height after three bounces for a drop height of 90 inches. My hypothesis is that the higher the ball is dropped from the higher it'll bounce back, the height should be constant and regular as in if the initial height is shorter the height it bounces back to also will be. - Height at which the tennis ball bounces Controlled: - Same ball - Height at which the ball is dropped - Amount of force applied - Person dropping the ball. Drop the golf ball. Drop the ball and let it bounce back up 4 times. Since the height to which the ball will bounce is directly proportional to its energy (barring effects of air friction), with a coefficient of restitution of less than one the ball will bounce less and less high. Observe, mark, and measure the height of the ball's bounce, remembering to … There is a lot of integrated math in this activity: measuring, averaging, and graphing. Both the height of drop and the height of bounce should be recorded in data table A. Follow these steps to conduct your experiment: Drop a basketball inflated to 8 psi from a height of 6 feet (1.8 meters). Here, the height correlation coefficient is much higher than the wingspan coefficient (0.173 vs. -0.031). When you drop a ball on a surface, it compresses and squashes slightly, before snapping back to its original shape. 2. record data. Kevinmaltusch's interactive graph and data of "Bounce Height vs. Drop Height" is a scatter chart, showing Tennis Ball, Golf Ball, Ping Pong Ball , Bouncy Ball, Col2 - fit, Col4 - fit, Col6 - fit, Col8 - fit; with Drop Height (cm) in the x-axis and Bounce Height (cm) in the y-axis.. If you were dropping the ball from 100 meters vs a kilometer, drag would be a big effect. 3. find average bounce height. Find a nice location to tape some meter sticks to your wall or up against a lab table. Egg Drop. They will put their fingers on the paper atthe height ofthe bounce, and make amark toshow the location. Most likely 1 _____ 2 _____ 3_____ 4_____Least likely Copy the video to a computer, and open it within LoggerPro. the ball bounces back to the drop height) and the minimum being no elasticity (i.e. Drop … As the drop height increased, more and more of the kinetic energy in the ball is lost during the fall and collision with the ground and so the difference between the bounce heights gets smaller. Students explore the concept of bounce. Record the height to which it rises on the third bounce. Calculate the acceleration due to gravity by using the kinematics equation s = v o t + ½at 2 and isolate the second half of the golf ball's bounce. Drop the ball and let it bounce back up 3 times. Overview: Your goal is to conduct an experiment that establishes a mathematical model between the drop height and rebound height of a bouncy ball (or tennis ball or whatever else that works…). Continue dropping the golf ball on the floor for 100 cm, 120 cm, 140 cm, and 160 cm. Align ball with retort stand4* at 0.55* m 7. ... • On the position vs. time graph, locate the maximum height of the ball during free fall. 90 80 70 60 Bounce Height (cm) 50 40 30 20 10 0 20 40 60 80 100 Drop Height … Also, the eight ball increased by 5cm in bounce height as drop height increased by 20cm. Salomon is a force within the running world, and their shoes are consistently best in class. Use the graph to predict the rebound However, it is possible that a more appropriate model is a cubic one, as So if f is 0.9, the first bounce will be 0.9 times as high, the second 0.81 times as high, the third 0.729 times as high (as the original height), and so on. We then transposed the data into a spreadsheet program for analysis and for production of the charts. Repeat the procedure by changing the release height to 75cm and then again to 50 cm. For Trial 1, hold the ball at a height of 40 cm, drop the ball carefully and observe the bounce height. She won't swing; she will just lightly bounce. Discuss measuring techniques and the importance of conducting fair tests. If the first height is h, the second will be f*h, the third f*f*h, the fourth f*f*f*h, and so on. The surface dropped on must always be the same. The constants must be the mass of ball, bouncing surface, and number of bounces because they are going to be the same during the whole experiment. Because we can drop the ball from any height we choose, the drop height is called the independent variable. Graph bounce height vs. drop height for each ball and draw the best-fit line for each ball. Can this ratio ever reach the number 1? 3. It might seem like this is a physics cheat to have the tennis ball bounce so much higher than it started (and that's probably why it's so cool to see it). 4. Draw a graph of your results (Rebound Height vs. Drop Height). Clearly indicate the units you used to measure the heights as part of the label (feet, cm, etc.). Drop the golf ball on the floor from 80 cm, repeating the rest of the above procedure. The more the ball slows during the bounce, the steeper will be the bounce angle. 2. Since steel snaps back much faster than rubber, the steel ball will bounce higher, especially when dropped on another very hard surface, like steel. The range of the average height of the bounces was 42.33 cm. Describe the relationship between drop height and bounce height._____ Use the graph to predict the rebound PocketLab physics lessons cover introductory and advanced topics from one-dimensional motion to electricity and magnetism to simple harmonic motion. 5. make a scatter graph. The dependent variable is the bouncing time T because this depends on the drop height. My hypothesis for this lab was: If I drop a ball at a high point, then the ball would bounce higher because it is dropping from a higher height. The balls dropped from 75 centimeters will bounce higher than those dropped from 50 centimeters, and the balls in the 50 centimeter trials will bounce higher than those in the 25 centimeter trials. Salomon S/Lab Ultra 3 ($180) Category: All-around Weight: 1 lb. 6. Without doing the measurement, the bounce height will be _cm if the drop height is 70 cm based on your graph. The force varies in a sinusoidal manner. Drop a ball from 50 cm and record how high it bounces. Looking at my data, both the tennis ball and golf ball increased by 15 cm as the drop height increased by 20 cm. Drop the ball 4 more times from 40 cm, recording the bounce height each time, for a total of 5drops. 7. Therefore the trend is only valid for the range 0 to 1. more of the available kinetic energy was stored and used in the bounce. At the bottom of your 200 cm drop, the ball is going a bit over 1/5 of terminal velocity. Drop Bounce Lab Problem: What is the relationship between the height from which a ball is dropped and the height to which it bounces? Both results are very far from statistical significance, as the wingspan p-value = 0.872, and the height p-value = 0.372. You then need find the best fitting straight line for the relation between the drop height and the bounce height 4. • Carefully climb the ladder or step stool with the two balls. record the pressure, start the camera recording, drop the ball, and stop the camera after the ball had reached its maximum bounce. 6. Hi TECH GEEK! Average the results of the five trials. 3. Drop height: Every basketball in all psi levels were dropped from the same height of 2.0 meters. get the bounce/drop ratio. On the graph, construct a bar graph, label the axes, and plot the average splatter versus the drop height. I predict that the higher the ball is dropped the higher it will bounce because at a higher height there will be more stored energy. According to ATP regulations, a tennis ball must bounce to a height of between 135 cm and 147 cm when dropped from 254 cm on to a hard surface.1. Drop the ball at least two times from each height with the average of the bounce heights used asthe final measurement. For a test to be fair, only one variable should be changed and the others kept constant. Then, using the bounce factor of the ball, you can predict the height of the ball after any number of bounces. Drop it again, and let it bounce twice. For every meter increase in drop height, the bounce efficiency decreases by 1% in the range of heights tested. Drop a stack of balls on the floor. Powered by Create your own unique website with customizable templates. 7. [IMAGE] Hypothesis I predict when doing this experiment that the higher we drop the ball from, the higher the ball will bounce to, because more potential energy is gained from a greater height and therefore it will have more kinetic energy at the surface and may bounce higher but energy is Kevinmaltusch's interactive graph and data of "Bounce Height vs. Drop Height" is a scatter chart, showing Tennis Ball, Golf Ball, Ping Pong Ball , Bouncy Ball, Col2 - fit, Col4 - fit, Col6 - fit, Col8 - fit; with Drop Height (cm) in the x-axis and Bounce Height (cm) in the y-axis.. Edit chart Loading graph 5. We used the graphical analysis software on the lab computers to record the bounce height for each trial. Set camera to record and drop ball from height to measure and record rebound height 6. Examples are: … Calculate the change in height and potential energy. Rebound Height (cm) Drop Height (cm) Trial 1 Trial 2 Trial 3 Mean 60 80 100 150 Table 13 2. The standard bounce required shall be not less than 23.5cm nor more than 25.5cm when dropped from a height of 30.5cm on a specially designed steel block. In conclusion the bounce height does depend on the drop height, and if I dropped a bouncy ball from 93inches it • Drop both balls at the same time, from the same height. PRE-LAB QUESTIONS 1. Thus, if the ball drops vertically with speed of v Start studying How Does Drop Height Affect Bounce Height. Variables that need to be controlled in this context include the size, material, and air pressure of the Material of the ball The height of the first bounce BALL DROP 3. msichicago.org EXTENSIONS LANGUAGE ARTS Have students work in groups to brainstorm a list of onomatopoeia words; words that reflect, imitate or suggest the source of the sound that it describes. The equation you need (between bounces) is one of the standard constant acceleration equations, s = ut + at 2 /2.s is distance, u is the initial speed (in this case zero), t is time, and a is acceleration (in this case, 32 ft/s 2). Record the bounce height in the data table. What we don’t: Expensive and not as cushioned as some models. Next we drop her with one rubber band attached to her ankles. Record the height to which it rises on the second bounce. the ball does not bounce), with an e value of 0. BOUNCE HEIGHT) Data Graph y=.756x+0.560 slope = .756 Y intercept = 0.560 linear regression = 0.99 Which is a very strong relationship. K-12 Lesson Plans: In this activity, students will realize that different sports use balls with different amounts of rebound. This is the tricky part. Record GPE for each drop height in data table. Remember the formula is: GPE = ball mass x drop height x acceleration due to gravity ***NOTE: make sure the mass of your ball is in kg and the drop height is in meters. 4. For Trial 1, hold the ball at a height of 40 cm, drop the ball carefully and observe the bounce height. For example, the coefficient of restitution for the soccer ball decreased from an average of 0.78 at one foot to an average of 0.74 at five feet. Items 1 2 needed bounces 1 Ball 2 2 3 Measuring tape it is only inches bounces. Think about the changes in motion a ball will undergo as it travels straight up and down. Graph paper is provided. Bounce height vs. drop height 9 Another valid graph 6 Work-energy bar chart 3 . The most common representation, graphing bounce height vs. drop height, leads to a straightforward analysis of the posed question, since if the ball behaved perfectly elastically, the slope of the graph would be 1. In this bounce instructional activity, students collect data on the rebound height of a ball over time. Procedure: Hold a ball at a distance of one meter from the surface of the table (diagram I). View the skater's kinetic energy, potential energy, and thermal energy as they move along the track. View Lab 1 - rebound height vs drop height (6).pdf from PHYSICS AP Physics at Carmel High School. Height of First Bounce Mass of Ball (grams) Height of First Bounce (cm) 7.5 16.4 36.2 70.0 75.0 80.333. 1. drop balls from 100-250cm in intervals of 25cm. Drop ball and record rebound height 8.

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