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. 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 … Continue dropping the golf ball on the floor for 100 cm, 120 cm, 140 cm, and 160 cm. 1. Procedure: Hold a ball at a distance of one meter from the surface of the table (diagram I). Bouncing Ball Lab Name_____ Per___Date _____ Problem: How does energy change form in two different kinds of bouncing balls? a. GPE = ball mass x drop height 5. = 0.187m / 0.500m x 100%. Repeat the procedure by changing the release height to 75cm and then again to 50 cm. Record all data. 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. 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. Repeat trial 4 more times 9. 4. ... • On the position vs. time graph, locate the maximum height of the ball during free fall. 3. The steepness of this “climb” will depend on the horizontal velocity. Graph paper is provided. 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 . Procedure. Repeat the procedure for 40 cm and 60 cm. View the skater's kinetic energy, potential energy, and thermal energy as they move along the track. Cushioning: Moderate Drop: 8mm What we like: Incredible fit and comfort for long distance efforts. Materials: “Superball” or other balls, wall made of cinder blocks or bricks, (meter stick - optional) Procedure: 1. 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 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. Drop the ball at least two times from each height with the average of the bounce heights used asthe final measurement. 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. 4. make a data table for the averages. In general, the coefficient of restitution decreased slightly as the drop height increased, but only a slight amount. When you drop a ball on a surface, it compresses and squashes slightly, before snapping back to its original shape. Rank in order from most likely to least likely that you think the graph that you will make in this lab will look like. Do the video analysis experiment with at least two different objects freely falling. Average the results of the five trials. 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. Person #1isgoing to drop their ball from the 100cmmark, and the rest ofthe team will observe itsbounce height. Learn vocabulary, terms, and more with flashcards, games, and other study tools. The range was from 200 centimetres to 20 centimetres, measured at 20 centimetre intervals. • Drop both balls at the same time, from the same height. When a ball bounces up and down on a flat surface, the maximum height it reaches decreases from bounce to bounce. Ser up the drop plate so that it is 20 cm above the bounce … Find a nice location to tape some meter sticks to your wall or up against a lab table. Drop it again, and let it bounce twice. the ball does not bounce), with an e value of 0. Each additional drop of the ball should reduce the uncertainty in our measurements. Average bounce height = (0.175m + 0.180m + 0.205m) / 3. Build tracks, ramps, and jumps for the skater. The standard height for most drop tests relies on the weight of the item being evaluated and the standards used for testing. Measure the height after two bounces. Plot the Drop Height on the horizontal (input or independent variable) axis and the Rebound Height (output or dependent variable) on the vertical axis. If you were dropping the ball from 100 meters vs a kilometer, drag would be a big effect. For every meter increase in drop height, the bounce efficiency decreases by 1% in the range of heights tested. 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. Draw a graph of your results (Rebound Height vs. Drop Height). Variables that need to be controlled in this context include the size, material, and air pressure of the Also, the eight ball increased by 5cm in bounce height as drop height increased by 20cm. 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. For Teachers 9th - 12th. Catch it after one bounce. Measure the speed and adjust the friction, gravity, and mass. 5. 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. Egg Drop. Prepare your students for real-world problem solving and open-ended lab experiments. 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. Welcome to PF! In this bounce instructional activity, students collect data on the rebound height of a ball over time. Record the bounce height in the data table. Drop Height vs. Average Bounce Height Salomon is a force within the running world, and their shoes are consistently best in class. The height to which the ball bounces is to be estimated as carefully as possible. 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. 4. For Trial 1, hold the ball at a height of 40 cm, drop the ball carefully and observe the bounce height. Clearly label the axes as Drop Height and Rebound Height. A lower defensive rating is better, so a more positive correlation is worse. Calculate the change in height and potential energy. A perfectly inelastic collision has a coefficient of 0, … If it is less, it will bounce less than a 45-degree angle. Record the bounce height in the data table. She won't swing; she will just lightly bounce. The force varies in a sinusoidal manner. Older students can even calculate the ratios of bounce height vs. drop height and observe if this ratio is consistent at all drop heights. This is the tricky part. Most likely 1 _____ 2 _____ 3_____ 4_____Least likely There is a lot of integrated math in this activity: measuring, averaging, and graphing. Lesson Planet. 4. 5. For Trial 1, hold the ball at a height of 40 cm, drop the ball carefully and observe the bounce height. 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. Record the height to which it rises on the third bounce. Next we drop her with one rubber band attached to her ankles. Drop a ball from 50 cm and record how high it bounces. 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. budget: $0.00 to $12.00. 2. record data. However, it is possible that a more appropriate model is a cubic one, as 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. Salomon S/Lab Ultra 3 ($180) Category: All-around Weight: 1 lb. 7. Follow these steps to conduct your experiment: Drop a basketball inflated to 8 psi from a height of 6 feet (1.8 meters). Drop the ball 4 more times from 40 cm, recording the bounce height each time, for a total of 5 drops. Rebound Height (cm) Drop Height (cm) Trial 1 Trial 2 Trial 3 Mean 60 80 100 150 Table 13 2. 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. 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. 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 …
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