Physical Science Lab - the motion of a marble
Objective
The goal of this experiment is to develop a theory, which allows us to understand the motion of a marble.
Materials
Wooden roller coaster, marble, ruler, timer, clamp, physics stand.
Theory
In this experiment, we are finding the Conservation of Energy. Energy is neither created nor destroyed. Energy is summed up into two different properties: Potential energy and Kinetic energy. The law of Energy states that:
Total Energy = Potential Energy + Kinetic Energy
Or
Em = Ep + Ek
Also, the equations for Potential energy and Kinetic energy are stated to get the Total Energy. They are respectively:
Ep = mgh and Ek = ½ (m)v2
The Conservation of Energy states that energy is always constant. If potential energy increases then kinetic energy decreases and vice versa.
In this experiment we positioned a marble ball on a wooden roller coaster positioned on a physics stand in the sixth hole. Throughout the experiment, we used an electronic timer to record the time of the marble where it passed through the light beam of its clamp. We positioned the clamp at a certain point on the roller coaster and measured the distance from the marble to the clamp; the height of the clamp; and finally the time the ball traveled through the clamp. After we recorded these different figures we calculated the speed of the marble from the given distance traveled and the time. We repeated the step 14 times, then proceeded to graph the speed and the height. Next, we took the measurements of position of the clamp, height, and speed and calculated the potential energy, the kinetic energy, and the total energy. Total energy calculated as mentioned before. Potential energy is taking the mass (m) which is 28.1g times gravity (g) which is 9.8 m/s2 times the height. Kinetic energy is one-half times the mass (m) times velocity (v2). Finally we graphed the calculated kinetic, potential, and total energies of this experiment.
For this theoretical result, the motion or speed of the marble will have different calculations. Also, the potential energy and kinetic energy of the marble will produce a mirror effect between each other respectively. From the result of the experiment, as the height of the marble increases the speed of the marble decreases at a slow rate.
Data
See attached documents.
Calculation
1) Speed of the Marble: Speed = distance traveled by marble / time from clamp A
One of the most interesting aspects of Diaz’s narrative is towards the end when Cortés broaches the subject of Christianity with Montezuma. Conversion and missionary work was one of the most important and lasting goals of the conquistadors and other contemporary explorers, they were charged with this duty by the rulers who sent t...
Both times he was beaten back to the coast by Maya armies. Shortly after his expeditions, Cortes suffered the same fate during his attempt to penetrate Cozumel and Champoton. In March of 1519, after both men’s failed attempts, Cortes put together a larger expedition with the expectation of being able to set up trade with the Maya. He hoped this would help lead to the establishment of a permanent Spanish settlement. Instead, Cortes was able to defeat small groups of Maya armies during this time. After being defeated, the Maya offered Cortes objects made of gold and told stories great empires that layed further into the mainland. Overcome with ambition and visions of conquest, all focus was moved from the establishment of a permanent settlement to tracking down and finding these
Another science that relates to potential energy is kinetic energy. Kinetic energy is the energy something has because an object is moving. Dropping a soccer ball converts the potential energy to kinetic energy. In all, energy makes things happen which is why energy can also be called the
From the bar chart, we see that the potential energy in general agrees with the case above, i.e. it increases up to the particle’s maximum height and decreases from that point on. The kinetic energy, on the other hand, behave significantly differently than expected. Rather than decreasing form the beginning to the maximum height and then increasing, the kinetic energy appears to fluctuate in a somewhat random manner. This can be best understood by treating the experiment as a closed system, where energy (but not mass) can leave the system and enter the surroundings. As the projectile moves through the air, it collides into air particles, imparting some of its energy to these particles in the form of friction, heat and sound, thus losing energy in the process. We therefore would expect the sum of the potential energy and the kinetic energy to decrease over time as the projectile loses energy to its surroundings. However, from the data from document , this also does not seem to be the case. This discrepancy can be explained by including experimental uncertainty, where errors in our measurements can lead to unjustified conclusions. In order to reduce the sources of these errors, the experiment should be run multiple times in ideal conditions, averaging over the results and calculating the resulting averaged energies.
The car (marble) has GPE at the top of the slope, and it has KE at the
In the first part of the document, Cortés and his men spend their time at Montezuma's palaces. Seeing the extravagant wealth of the Aztec king, Cortés begins his seduction (all the while knowing that Montezuma believes that he may be the fulfillment of a prophecy). He embraced Montezuma with the greatest reverence and "…told him that now his heart rejoiced at having seen such a great Prince, and that he took it as a great honour that he had come in person to meet him and had frequently shown him such favor" (World History: Castillo, 247). Cortés and his men are brought into the house of Montezuma and all of his riches are now at their disposal to observe and share in. Montezuma tells Cortés: "Malinche you and your brethren are in your own house…" (World History: Castillo, 247). The wealth of Montezuma is magnificent. Each soldier is given tw...
Energy can never be created or destroyed. Energy may be transformed from one form to another, but the total energy of an isolated system is always constant.
The purpose of this lab report is to state the results gathered by the values of the coefficients of kinetic friction and the coefficient of static friction for two particular surfaces. The theory behind it is that if a body is at rest or moving with constant velocity, it is in equilibrium and the vector sum of all the forces acting on it is zero. The force of friction is always opposing the motion and is always opposite in direction. This lab gave us a chance to bring the inclined plane problems we have been doing in class to real life.
The source discusses many of the same events that The Broken Spears does, however they are more polished and detailed. The more detailed nature of the text itself can be attributed to the fact that The Conquest of New Spain most certainly contained less errors in translation when compared to The Broken Spears. The document was originally written in Spanish, whereas The Broken Spears contains a compilation of documents translated from the Aztec’s native Nahuatl. Another factor to consider when looking at The Conquest of New Spain as a source is the fact that Bernal Diaz himself was a solider under Cortes’ command. His account is perhaps one of the most accurate due to the fact that he was actually present during all of the events he describes in his account. It is also extremely important when looking at this document through the lens of history to consider the differences in faith between the Aztecs and the Spaniards. Diaz and his fellow soldiers were Christian and many of the abnormalities that he attributes to Aztec life, such as human sacrifice, choice of clothing, and their temples, are related to their native religious traditions and were extremely foreign to him. Another interesting aspect of The Conquest of New Spain to highlight is Diaz’ status as a soldier under Cortes’ command. Diaz often depicts Cortes as less of a heroic figure, which is often how Cortes describes himself. In one particular passage Diaz describes Cortes as “…very frightened,” when he sees how numerous the Aztec forces are in their canoes. He goes on to say that Cortes, “…stationed himself in the lake, so that if he his men hard pressed he could sail out freely and hurry to any place he chose.” These types of descriptions of Cortes by Diaz aim to attribute his feats to those of his
Born a poor Spaniard to a family of lesser nobility but well educated, Hernán Cortés was born in Medellin, Spain. In 1519 Diego Velázquez appointed Hernán Cortés as leader and ordered him to lead an expedition to secure and conquer Mexico. Prior to their journey a disagreement between both of them triggered Velázquez to rescind his instructions he had made to send Cortés to Mexico. Cortés disregarding Velázquez orders proceeded and set sail to Mexico with a small private army of an estimate of 508 men from their Spanish base in Cuba to Mexico arriving at the Yucatán Peninsula in 1519 with motives of trade and exploration. The success of this voyage presented Cortés a title in which he would be remembered as “a veteran of the Caribbean phase of Spanish overseas expansion.” (3)
We ran into Newtons First Law, which claims that an object resists change in motion, as the marble rolled down the floor it didn’t stop until it was acted against by friction. As we moved on, Newtons Second Law came into play when we were creating our lever as we need a ball that would roll down with enough acceleration that it could knock down the objects. Newton’s second law claims, that F=MA. So, we choose a golf ball since it would have more mass than a rubber ball, but it would have less acceleration when the lever was started. This way, it would knock the upcoming objects. Newtons Third Law claims that every action yields an equal and opposite reaction. This is proven in our Rube Goldberg Machine when the small car was rolling down the tracks as the wheels pushes against the track making the track move backwards. The track provides an equal and opposite direction by pushing the wheels forward.
In the experiment these materials were used in the following ways. A piece of Veneer wood was used as the surface to pull the object over. Placed on top of this was a rectangular wood block weighing 0.148-kg (1.45 N/ 9.80 m/s/s). A string was attached to the wood block and then a loop was made at the end of the string so a Newton scale could be attached to determine the force. The block was placed on the Veneer and drug for about 0.6 m at a constant speed to determine the force needed to pull the block at a constant speed. The force was read off of the Newton scale, this was difficult because the scale was in motion pulling the object. To increase the mass weights were placed on the top of the ...
An investigation into how changing one variable influences the rate of reaction between marble chips and dilute Hydrochloric acid
type of energy is lost or gained, and whether or not a factor that is
2. A He and H atom collide elastically in a head-on collision. (a). If they have the same kinetic energy (KE) to begin with, which one gains KE? Answer this by calculating the amount gained and lost for both, relative to their initial value. (b). Suppose the atoms had the same mass but different kinetic energies? Do not do a detailed calculation here, but instead make a physical argument as to why the “slower” thus “cooler” atoms would slow down the faster, hotter atoms. This is one process for the moderation of hot neutrons in a nuclear fission reactor by the water used as its coolant.