their takeoff (Alexander, 1990; Dapena 1992). Upon launch the objective is for the athlete to have their back entirely to the crossbar at the height of the jump, and their head and feet drooping over as their hips clear the height. This is commonly referred to as the arch or layout (Burns, 2013).
High jump can be divided into three phases: the momentum building or run-up phase; the takeoff, launch or flight phase; and lastly, the bar clearance phase (Dapena, 1992). The run-up helps the athlete to build momentum, thereby creating the correct conditions for the beginning of the takeoff. When the athlete is in the flight phase, the takeoff leg pushes down on the ground, it is this exertion of force that determines the greatest height that the center of gravity will attain after leaving the ground, and the angular or rotary motion that the body will have through the bar clearance (Dapena, 2013). During the bar clearance phase athletes generally employ a technique referred to as the Fosbury flop. The most important thing for the athlete to do during this phase, is keep everything that could hit the bar, out of the way; the head should not be dropped until it has cleared (Burns, 2013).
My high jump can be compared to that of Erik Kynard, who is at a professional level for this event. Kynard gained silver at the 2012 Olympic Games with a height of 2.33m. (Show first clip) When both jumps are assessed, the differences are evident. The most important phase of high jump is the…
What makes a good rocket? Many things go into making the perfect rocket, but just what are they? That is what Colin Robinson and Heidi Hall set out to find out. The first thing that had to be tested was the ideal mass of the rocket. A lot of the rockets distance depends on the mass and the area. Another variable that had to be tested was how many fins to use based on the ideal mass for the rocket. In a rocket it is normally true that it will fly the farthest if the mass is closer to the front,…
Suhani Shah & Emma Bekhet
Purpose: To develop an efficient and accurate method of using torque to mass a meter stick – without using a triple beam balance or spring scale / force meter.
One meter stick
Three sliding Clips
One 50 gram hanging mass
Attach a sliding clip at the 50 cm mark of the meter stick and place meter stick on a fulcrum.
From that point, move the sliding clip left and right (based on which side of the meter stick is…
of an extended object. However,
there is one point, associated with the geometric mean center of the mass
distribution of an extended system, known as the center of mass, always
behaves like a point particle as if all the external forces, and the mass of the
entire system, are on that point. In this view, all the…
The instability of the roller coaster creates a spring constant. This means that as the car travels through the roller coaster, it loses energy because the track shakes and moves.
For example, when viewing the videos it became apparent that when the car entered the loop, the track shook violently making it difficult to determine when the car reached each location.
As the car went through the track, going up into the loops it grew in height, decreasing in kinetic energy while increasing in…
Lab 3: Technology
Section: General Physic Lab 3
The goal of this experiment was to learn how to apply computerized instruments in physics. In addition, this experiment aimed at enhancing practice on how to use three equipment in the lab: the rotary motion sensor, high resolution force sensor, and motion sensor. Further, this experiment sought to clarify the circumstances under which the instruments fail to comply with expectations.
Part 1: The…
Newton’s three laws of motion essay
Isaac Newton was an English physicist, mathematician, astronomer, and natural philosopher who lived in the 17th century. One of his accomplishments was coming up with three laws of motion that can be used to explain how and why stuff move. These laws that Newton came up with are still used today.
Newton’s first law of motion states that “an object in motion will stay in motion, and an object at rest will stay at rest unless an unbalanced force acts on it”.…
Stephen was because there was easy access. First and foremost it’s a public church; anyone can go and attend mass or talk to Father Ken if they want to. It’s especially easy for students to do so because it’s very close to campus and is practically all student run. Our group also had an inside connection with a member of the church which helped us to get a foot in the door. One of the member’s roommates is Catholic and goes to church every week, so it was easy to ask her questions about the…
The acceleration of the object will increase as the force of the object increases. In this case the propelling force is thrust. In order to increase thrust, the water must be expelled from the rocket at a fast rate. Secondly as the mass decreases, acceleration will increase due to the inverse proportions and because of the increasing Fnet. Therefore the rockets mass, must as minimal as possible, in order to have an increase in acceleration.
Fnet = ma
Newton’s Third Law of Motion – For every…
Newton’s First Law states “any object at rest, will tend to stay at rest, and any object in motion, will tend to stay in motion unless acted on by an unbalanced force” , The Science Classroom. In this case the object at rest is the soccer ball at the initial of the game which is at rest at the center of the field. When the game starts the unbalanced force that will act upon the ball will be the foot hitting the ball to make it move in either direction. This force , the foot of the…