CONSERVATION OF MOMENTUM PRACTICAL WRITE UP
AIM: To investigate if momentum is conserved in two-dimensional interactions within an isolated system.
HYPOTHESIS: Without the effects of friction the momentum will be conserved in the isolated system. In all three experiments the momentum before the interaction will equal the momentum after the interaction.
METHOD: An air hockey table was set up and a video camera on a tripod was placed over the air hockey table. The camera was positioned so it was directly above the air hockey table facing downwards. The air hockey table was turned on and two near identical pucks were placed on the table, one at one end of the table and one in the centre. The puck at the end of the table was launched by
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This would have created friction which is regarded as an external force; therefore the pucks were no longer in an isolated system. Another random error occurred in the first experiment where the red puck was initially held down to prevent it from moving and released when the black puck collided with it. Due to the person's reaction time, holding it in place may have interfered with the collision as it was an external force and this may have impacted upon the results.
Several systematic occurred in this experiment, but the most important one would have been the fact that the air hockey table was not completely level. This impacted upon the experiment in two ways. In the first experiment where the red puck is initially stationary, as the table was not level it moved around before the black puck collided with it. To overcome this the red puck had to be held in place and as mentioned before this would have provided and external force acting upon the puck. The unevenness of the air hockey table also meant that there was a possibility of friction acting on the pucks while they were moving. In the third collision with the Velcro another systematic error occurred. When the two pucks collided and stuck together they did not continue straight, instead they rotated. This is not linear momentum but rather it is angular momentum. This is reflected in the results as the magnitude of the initial and final momentum of the system is equal, but the
The fastest growing sport in America is lacrosse, and in order to play lacrosse, it is important to first understand the physics of the game. Lacrosse players around the world use physics while playing without even thinking about it. With no knowledge of physics, it would be pretty difficult to master the fastest game on two feet. One of the worlds greatest scientist, Isaac Newton, established three laws dealing with physics, and using these laws will make it possible for a lacrosse player to understand what he or she needs to do in order to throw a ball. Newtons first law deals with inertia, his second law deals with the relationship between mass, acceleration and force, and his third law deals with opposite reactions. When talking about lacrosse, it is essential to cover Newton’s first law, his second law, and his third law in order to understand the physics behind throwing a lacrosse ball. .
Lacrosse is a team sport that originated in the St. Lawrence Valley area, around 1546. It is played with a small rubber ball, a long stick with a sort of basket at the end, and padding (it is a contact sport). The objective of the game is to shoot the ball into the other team’s goal, using the stick to pass, cradle and shoot. At first, the game was played on a distance of even several miles, and anywhere between 100 and 100000 players in a single game. The teams are now composed of ten players each, 3 of them are offense, 3 defense, 3 midfielders, that can go anywhere on the field, and one goalie, which is the heart of the team. In this essay I will focus on the physics that stand behind lacrosse, and how companies that make lacrosse gear use our knowledge and understanding of forces to make padding and helmets that are safer, and sticks that are made for different kinds of play styles (contact defense, precision, fast offense…).
“Standard physics has no explanation for this and an error has not yet been found… There is no explanation for this behavior in standard physics because it violates the conservation of momentum, and Shawyer 's own attempt to explain it using special relativity is not convincing, as this
Newton's third law states for every action there is an equal and opposite reaction. When throwing a lacrosse ball, the stretch in the netted pocket and the motion of the ball counteracts the force put into swinging the stick (http://www.livestrong.com/article/487887-the-physics-behind-throwing-a-lacrosse-ball/).
There is a dark cloud hanging over the world of contact sports and it is growing at an alarming rate. With the size and speed of today’s athletes, the sports of football and hockey have become more exciting, fast paced, wide open, and fun to watch. However, there is another consequence of these ever growing athletes on their sports. They have made the collisions in them increasingly more violent. The velocity that these athletes hurl themselves through the air has created an atmosphere that could not have been imagined when these sports were created. Although the athletes’ bodies have become
We experience each of Sir Isaac Newton's laws everyday. In a car, pushing a car, or even in a fight. All of these laws have to do with motion. You can experience the first law in a stopping car, the second when you are a pushing a shopping cart, and the third one in the water.
1) Once the simulation opens, click on ‘Show Both’ for Velocity and Acceleration at the top of the page. Now click and drag the red ball around the screen. Make 3 observations about the blue and green arrows (also called vectors) as you drag the ball around.
Silence intoxicated the stadium as Patrice Bergeron glided to the face-off dot against Nazem Kadri. Tension was so thick that you could cut it with a knife. Above, the massive scoreboard read 1-1, which was way too close for comfort. The ref then took a brief glance, analyzing the positions of each player, to ensure they were in their correct positions. He blasted the whistle and the game was on. Next, the puck was dropped in a sudden motion, keeping it remaining completely horizontal the whole way down until it was swiped at rapidly by the Men’s sticks. For me, it felt so surreal to be at the Air Canada Center, observing the action with my own very eyes. In front of me, were the very players I’ve dreamed of witnessing all my life. I could
Moving along, to the second experiment, “How does force affect your game?” concludes that using a 10 pound ball applying strong force provides a velocity (m/s) of 3.2, a result of 25 (J) for the kinetic energy, and 5 bowling points
5. A hockey player hits a puck at one end of an empty skating rink. The puck travels across the ice in a straight line until it is stopped by the goal at the other end. Explain how each of Newton’s laws of motion applies to this situation.
In Hitting a Baseball: A Biomechanical Description, they mentioned that researchers have studied bat dynamics, and described the bat’s movement during the swing, using the software we use in class, the three-dimensional components of its motion (Welch, 193). The movement and coordination of the body during the swing has always been the most difficult thing to account for during this study. Compared to other movements, there hasn’t been many studies on the kinematics and kinetics of the baseball swing. In the Biomechanical Analysis of Baseball Hitting, they mentioned the analyzation of the relative angular movement of the bat prior to that sweet sound of laces and lumber. They found that the bat had a drastic increase in the rate of velocity before it made contact (Hirano, 21). Many other studies have been done, however, these two were the two journals that seemed to have the most reliable
A team member might have been rushing while she was reading the mass. Lastly, this experiment taught the lab how to observe the temperature of ice and water during the constant addition of heat, use logger pro probes and software to collect and analyze the data and most importantly, observe graphically the temperature data as the ice melts, water warms then
2. No, the forces went in equal and opposite directions just as the rubber band and string
The forces that are involve with the experiments are basically focused on the concurrent forces. The experiment also allows us to develop the condition of balancing or arranging the angles both sides on a force table. This laboratory experiment allows us to take the mathematical abstraction of a vector to make it tangible as possible. This experiment will look into two ways of