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Forces Essay

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vidisingh

Vidisha Singh conducted an experiment to measure the force of different ball materials dropping from 80 cm onto a force plate. Three ball types were tested: leather, plastic, and rubber. Each ball was dropped 5 times, and the average force recorded. Plastic balls produced the highest average force at 201.42 N. Rubber balls were second at 174.14 N, and leather balls had the lowest force of 112.98 N. This did not support the hypothesis that denser materials would produce higher forces. The method could be improved by taking more trials to increase accuracy, ensuring balls drop from precisely 80 cm, and centering ball impacts on the force plate.

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Vidisha Singh Name: Vidisha Singh Forces Experiment
Vidisha Singh
Vidisha Singh Name: Vidisha Singh Partners: Tony, Gyeong Uk Date of experiment: December 3, 2010 Dropping Different Types of Balls Aim: To measure the force of different types of balls Hypothesis: The denser the material of the ball, the higher the force it exerts onto the force plate which will give us a higher reading on our computer. Variables: Input variable: The material of the ball. We will change it by dropping balls of different materials but same size. Output variable: The amount of force (Newtonʼs) that the balls exert. We will measure it by dropping it unto a force plate that will give us a reading of how much force has been exerted. Control variables: Control variable 1: The height. The dropping height will be 80 cm. Control variable 2: The force plate. We will use the same force plate. Control variable 3: The size of the balls would be the same by keeping the same diameter of the balls. Materials: • 1 Force Plate • 1 Meter stick • 1 Retort stand • 1 Leather ball • 1 Plastic ball • 1 Rubber ball • 1 Stand and clamp
Vidisha Singh Method: 1. Gather all the equipments needed for this experiment; (Retort stand, the balls, stand and clap, the force plate and the meter stick) 2. Set up equipment. 3. Mark out 80 cm from the meter stick 4. Get the software for the force plate 5. Make sure that the force plate works as well as the application 6. Check if the force plate works by dropping something on it and recording the results. 7. If works, then start out with testing for one of the ball 8. Start out with having the ball 80 cm higher than the force plate. 9. Start recording the measurements by clicking on record at the count of 3. 10. Drop the ball as soon as the counting ends 11. When the ball bounces off the force plate, stop recording 12. Record the results in the table 13. Get ready with the ball for another run 14. Get at least 5 trial run through. 15. Switch to another ball 16. Repeat steps 8-15 with the other two ball at having at leat 5 trial runs for each one. 17. At the end of the experiment make sure of having 5 trial runs for each ball 18. Get the average of the trials for each ball too. 19. Clean up the experience base and put everything back into where it was cleanly. 20. Give and check results with members of the group.
Vidisha Singh Data Table: Dropping different types of ball Types of Trial 1 Trial 2 Trial 3 Trial 4 Trial 5 Average Balls (N) (N) (N) (N) (N) (N) Leather Ball 117.2 110.6 114.7 111.2 111.2 112.98 Plastic Ball 173.7 213.7 189.0 182.0 248.7 201.42 Rubber Ball 202.0 194.4 194.4 134.7 145.2 174.14 Graph: Average  force  of  balls   250   200   Amount  of  Forces  (N)   150   100   50   0   Leather  Ball   Plas0c  Ball   Rubber  Ball   Different  types  of  balls   Conclusion: From what the results were, the average force (N) of the leather ball was 112.98 N. The plastic ball had the average force (N) of 201.42 N, and for the rubber ball it was 174.14 N. So looking at the force of each ball, the ball that landed in more force was definitely plastic ball, followed by the rubber ball and the leather ball was landed with the least amount of force exerting from it. Every trial we had except of one, plastic ball landed with more force than others. For example in trial 2, plastic ball landed with 213.7 N, while the leather ball and the rubber ball landed with 110.6 and 194.4 respectively. But only in trial one, the ball that landed with the most force was the rubber ball because it landed with 202.0 N,
Vidisha Singh while the leather ball and the plastic ball landed with 117.2 N and 173.7 N respectively. Hence every trial but one had the same type of result repeatedly. Concluding that the data resulted was reliable, because there were 5 trials run through and then averaged out. Our hypothesis was turned kind of proved out to be wrong, because the ball material, which was denser had the second most force (N) exerted. But also looking at it its not all dense because its not all compacted, so it wouldnʼt exactly be fully dense. Evaluation: The method used was very good because it was very useful because the steps written down guided through each necessary steps, and made the set up and the whole experiment sound easy and helped guide through. I believe that my method did give me a reliable data since we followed the method and got our experiment finished. Also because we had mentioned the fact that this experiment should be repeated 5 times so we have a clear data. The error in my method was that we only did 5 trial runs, which didnʼt give us an accurate measurement. So next time we will try to have more trial runs so then we will have more accurate data provided. Second error that I noticed is when we were dropping the ball; we hadnʼt exactly been accurate when setting the ball up 80 cm higher from the force plate. This makes us go off what we had naturally planned, which then changes one of our control variable to another input variable. So next time I will try to get it accurate so it drops from 80 cm not any higher or lower. Another error that we faced was that near the end we realized that we should have dropped the ball in the center of the force plate because then the force would have been measured accurately since then it could have measured the force it dropped better. We believe this because if the ball is on the sides then the reading are different, as we have noticed. So next time our aim is that we will aim the ball in the center of the force plate. If we would have to do another investigation then we would have changed the height of the ball being dropped from. That would have been the input variable. The control variable would have been same ball being used throughout the experiment. The Errors: Error in Your Method Effect on Your Data Improvement to your method Only 5 trial runs Not that accurate We could have more trial runs so we can make sure that the data is more accurate Try to get the ball to fall Because then it records Next time we will try to aim in the center of the the force exactly right the ball in the center of the force plate. and then the impact it force plate, so it will record landed it would be the force accurately. recorded. Maybe try to set the It wasnʼt exactly 80 cm Next time we will measure ball at exactly at 80 cm when we dropped it. So exactly 80 cm high before we high when throwing. it wasnʼt that accurate. set it to drop.
Vidisha Singh

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Forces Essay

  • 1. Vidisha Singh Name: Vidisha Singh Forces Experiment
  • 3. Vidisha Singh Name: Vidisha Singh Partners: Tony, Gyeong Uk Date of experiment: December 3, 2010 Dropping Different Types of Balls Aim: To measure the force of different types of balls Hypothesis: The denser the material of the ball, the higher the force it exerts onto the force plate which will give us a higher reading on our computer. Variables: Input variable: The material of the ball. We will change it by dropping balls of different materials but same size. Output variable: The amount of force (Newtonʼs) that the balls exert. We will measure it by dropping it unto a force plate that will give us a reading of how much force has been exerted. Control variables: Control variable 1: The height. The dropping height will be 80 cm. Control variable 2: The force plate. We will use the same force plate. Control variable 3: The size of the balls would be the same by keeping the same diameter of the balls. Materials: • 1 Force Plate • 1 Meter stick • 1 Retort stand • 1 Leather ball • 1 Plastic ball • 1 Rubber ball • 1 Stand and clamp
  • 4. Vidisha Singh Method: 1. Gather all the equipments needed for this experiment; (Retort stand, the balls, stand and clap, the force plate and the meter stick) 2. Set up equipment. 3. Mark out 80 cm from the meter stick 4. Get the software for the force plate 5. Make sure that the force plate works as well as the application 6. Check if the force plate works by dropping something on it and recording the results. 7. If works, then start out with testing for one of the ball 8. Start out with having the ball 80 cm higher than the force plate. 9. Start recording the measurements by clicking on record at the count of 3. 10. Drop the ball as soon as the counting ends 11. When the ball bounces off the force plate, stop recording 12. Record the results in the table 13. Get ready with the ball for another run 14. Get at least 5 trial run through. 15. Switch to another ball 16. Repeat steps 8-15 with the other two ball at having at leat 5 trial runs for each one. 17. At the end of the experiment make sure of having 5 trial runs for each ball 18. Get the average of the trials for each ball too. 19. Clean up the experience base and put everything back into where it was cleanly. 20. Give and check results with members of the group.
  • 5. Vidisha Singh Data Table: Dropping different types of ball Types of Trial 1 Trial 2 Trial 3 Trial 4 Trial 5 Average Balls (N) (N) (N) (N) (N) (N) Leather Ball 117.2 110.6 114.7 111.2 111.2 112.98 Plastic Ball 173.7 213.7 189.0 182.0 248.7 201.42 Rubber Ball 202.0 194.4 194.4 134.7 145.2 174.14 Graph: Average  force  of  balls   250   200   Amount  of  Forces  (N)   150   100   50   0   Leather  Ball   Plas0c  Ball   Rubber  Ball   Different  types  of  balls   Conclusion: From what the results were, the average force (N) of the leather ball was 112.98 N. The plastic ball had the average force (N) of 201.42 N, and for the rubber ball it was 174.14 N. So looking at the force of each ball, the ball that landed in more force was definitely plastic ball, followed by the rubber ball and the leather ball was landed with the least amount of force exerting from it. Every trial we had except of one, plastic ball landed with more force than others. For example in trial 2, plastic ball landed with 213.7 N, while the leather ball and the rubber ball landed with 110.6 and 194.4 respectively. But only in trial one, the ball that landed with the most force was the rubber ball because it landed with 202.0 N,
  • 6. Vidisha Singh while the leather ball and the plastic ball landed with 117.2 N and 173.7 N respectively. Hence every trial but one had the same type of result repeatedly. Concluding that the data resulted was reliable, because there were 5 trials run through and then averaged out. Our hypothesis was turned kind of proved out to be wrong, because the ball material, which was denser had the second most force (N) exerted. But also looking at it its not all dense because its not all compacted, so it wouldnʼt exactly be fully dense. Evaluation: The method used was very good because it was very useful because the steps written down guided through each necessary steps, and made the set up and the whole experiment sound easy and helped guide through. I believe that my method did give me a reliable data since we followed the method and got our experiment finished. Also because we had mentioned the fact that this experiment should be repeated 5 times so we have a clear data. The error in my method was that we only did 5 trial runs, which didnʼt give us an accurate measurement. So next time we will try to have more trial runs so then we will have more accurate data provided. Second error that I noticed is when we were dropping the ball; we hadnʼt exactly been accurate when setting the ball up 80 cm higher from the force plate. This makes us go off what we had naturally planned, which then changes one of our control variable to another input variable. So next time I will try to get it accurate so it drops from 80 cm not any higher or lower. Another error that we faced was that near the end we realized that we should have dropped the ball in the center of the force plate because then the force would have been measured accurately since then it could have measured the force it dropped better. We believe this because if the ball is on the sides then the reading are different, as we have noticed. So next time our aim is that we will aim the ball in the center of the force plate. If we would have to do another investigation then we would have changed the height of the ball being dropped from. That would have been the input variable. The control variable would have been same ball being used throughout the experiment. The Errors: Error in Your Method Effect on Your Data Improvement to your method Only 5 trial runs Not that accurate We could have more trial runs so we can make sure that the data is more accurate Try to get the ball to fall Because then it records Next time we will try to aim in the center of the the force exactly right the ball in the center of the force plate. and then the impact it force plate, so it will record landed it would be the force accurately. recorded. Maybe try to set the It wasnʼt exactly 80 cm Next time we will measure ball at exactly at 80 cm when we dropped it. So exactly 80 cm high before we high when throwing. it wasnʼt that accurate. set it to drop.