Lab Report On Projectile Motion

The factors at play during the catapult test were the most complicated out of all three tests. One of these factors was projectile motion. Projectile Motion is motion under the influence of gravity and is represented by the equation h(t) = –4.9t2 + v0t + h0, where v is equal to the initial velocity of the object and h is equal to the initial height of the object. The initial height of the object should have been the same because the soccer ball was released by pulling 91 cm (3 ft) back and 61 cm (2 ft) down. This means that the velocity had to change for the results to have any variation. Newton’s Second Law applies to this test as well. The greater the mass of the ball, the more force it will require to achieve the same velocity as the balls that weigh less than it. So, the balls with lower pressures should have performed better. However, potential energy also applies here. PE=mgh. The acceleration due to gravity and the height were the same, but the mass changed. With a decrease in mass comes a decrease in potential energy. So, the potential energy would have been greater with balls of a higher pressure. Kinetic energy also came into play in the catapult test, but it was balanced. KE=

Objective: Using a marble launcher, launch marbles from different angles with different forces to find the maximum height and the velocity as it leaves the launcher. Using different variables and results to determine how the different angles and amounts of force effect the variables. With this data show the effect the forces cause in 1-D and 2-D motion, as well as in the X and Y directions. This is done through kinematic equations and calculations.

C. What happens to the speed as time goes by for the car on the downhill ramp?

There were many opportunities for error within this lab due to the procedure the group decided to follow. However, the percentage error was not very significant, with a 1.12% to 6.71% difference between the actual and predicted velocity. The slight difference between the percentages could have been a result of parallax, instrument resolution, environmental factors, and the lack of trials. Once major source of error was the group’s decision to bypass collecting many data trials in the interest in time. This may have introduced biased sample fallacy into the conclusion because there were only two trials per a flying toy and which was little evidence to support the statements made about the relationship between velocity, acceleration, and circular motion. For the next lab, the group plans to conduct at least three trails and then use the average to avoid this bias. Environmental errors present during this lab included classmates walking into the flying toy while the group was collecting data,

In light of our final exam, the chuck a duck project, we are to learn about projectiles, trajectory, and the factors that affect these things.

In the first experiment, “ How does mass affect your game?” it shows that the data on “Ball- Mass 3” that the 10 pound bowling ball had the highest kinetic energy of 27(J), the greatest velocity (m/s) of 3.42, and in average it produced 4 bowling points. According to the data, on “ Ball- Mass 1” the 11 pound ball got an average velocity (m/s) of 3.14, the kinetic energy of 24 (J), and the average bowling points of 3. On the other hand, the evidence shows that the 12 pound bowling ball in “ Ball- Mass 2” has the velocity (m/s) of 3.12, the kinetic energy of 23 (J), and the average bowling points of 4 . Concluding that in my Game 1 the velocity of the masses of the bowling balls decreased when the bowling balls were heavier and that the kinetic energy was lower as the mass increased in the bowling balls.

The purpose of my science fair was to figure out what angle in shooting will produce the most amount of goals. First I chose which angle for shooting is more effective to produce the most amount of goals in a game. I chose this because in my games I have found that sometimes we miss the shots on goal, and I wanted to find a way to put an end to it. That's why I chose this for my science experiment. My results were that the 45 degree angle proved to be the best angle for shooting and -90 degree angle was the worst.

In this experiment we first tried to find an experimental value for g. This was done by dropping a golf ball below a sensor that would read and chart the position vs time graph and the velocity vs time graph. From this we could receive an equation and numbers that are useful in finding the velocity and acceleration of the ball in order to find the experimental g value. Then we did another experiment in which we would hold out a ruler between another person's index finger and thumb and then drop it, measuring how many centimeters it took for them to catch the ruler. Using this and an equation we could measure their reaction time.

In the hypothesis test we determined the null will be rejected based on the p-value (0.01) which is less than alpha level (.05) and if a bell curve was created the t-stat (2.53) and t-critical (1.67) would support the decision. The information from the collected data shows UniDun ball cannot be driven further than the SFballs.

Firstly, measuring the exact distance of the ball travel can be a challenge especially when zoomed far away. Also it is hard to tell exactly where is the highest point of the parabola vertically because there are dots between the lines, it is tempting to measure from the top of the dot which can thrown of the result by one or two whole numbers. As this is a computer generated experiment, the results would be much different if experimented in real life. Although the Gizmo accounts for air resistance, it does not account for other factors like the direction of wind or how much/little air resistance since the forces of nature are always changing. If the experiment was done in real life there must be multiple trials and each trial will not be exactly the

1. What is your question? Which ball will hit the hardwood floor the fastest the medium foam ball or the small rubber ball? 2. What assumptions do you need to make to try to answer the question? (Assumptions are things you don't know, but might suspect.

Then, drop the ball from a certain height, in this case starting from 60cm. The first person is to hold the ball at 1m high (or predetermined height), to ensure an accurate trail each time, use a ruler to measure the ball along the height. When the set-up is ready, and the second person is recording,

Overall, there were little to no complications for this experiment. There were modifications made to the first part of this lab, the student written portion. One change was the distances. In the original written procedure, see Attachment 02 of this report, the distances for all parts were noted as; next to the heat source, 5 inches away, and 10 inches away. After testing these measurements in the lab, the distances were alter to be next to, 2 inches away, and 5 inches away. This was done in order to produce more prominent temperature results. The distances for the 10 precision measurements were also modified. Originally the student was to take measurements for 80 seconds, starting at 2 inches away from the heat

A-1. Describe the goal of the experiment or state the hypothesis or problem to be solved. Describe the purpose for doing the experiment ( why is it important). The goal of the experiment is for me to become familiar with the various types of glass and equipment that will be used later throughout the Science course.

The purpose of the experiment was used to determine which team created a design that ultimately proved to launch the marshmallow the farthest. What was determined to be true was that the structure that contained the right configuration in producing a high amount of force proved to have the greater amount of displacement of the marshmallow. This proved the group’s hypothesis. However, when the group was compared to other groups conducting the same experiment, the displacement of their marshmallow was the shortest. This was a result of miscommunication between group members that proceed to affect why the group had the lowest measurement of displacement. As mentioned in the research, projectile motion was shown when the marshmallow was launching