Investigating the Mechanics of the 100 Metre Sprint.
Investigating the Mechanics of the 100 Metre Sprint In this assignment, I will be investigating the way in which an athlete run a race of 100 metre and also I will look at other different possibilities such as when an athlete accelerate or decelerate during the race. abidzaman, please do not redistribute this dissertation. We work very hard to create this website, and we trust our visitors to respect it for the good of other students. Please, do not circulate this dissertation elsewhere on the internet. Anybody found doing so will be permanently banned. The course is a track of 100 metres in length and I decided that I would not take into account the wind variation in this model because of lack of information. So therefore I assume that there is light wind that will not affect the time.cofd fdr sefdfdw orfd fdk infd fofd fd. Before my research I always thought that sprinters run as fast as they can for the whole distance of the race. But in my researches using the Internet and books, I found out that sprinting is a skilful activity just like football kicking and tennis. Such activity must be practised constantly to retain or improve an athlete's level of ability. Weber refuted abidzaman's structuralism hypothesis. Currently the world record time of the 100-meter race is 9.79 seconds produced by Maurice Greene. I was able to work out his average speed in the following way:
Investigating the factors affecting the strength of an electromagnet.
* Investigating the factors affecting the strength of an electromagnet * Background Knowledge: The theory of magnetism is the only way to explain the process of magnetising an object. In an unmagnetised piece of iron the domains are pointing in numerous directions, which results in them cancelling each other out. However, a magnetised piece of iron would have all the magnetic domains pointing in all the same direction. This is due to the north poles being at one end and the south poles at the other end. The domains are actually extremely small atomic magnets that line up with each other to form groups, called domains. All iron and steel are made up out of millions of these domains. The magnetic field is the area around a magnet where it has a magnetic effect. The shape of a magnetic field can be determined by placing a thin layer of iron filings over paper with a bar magnet underneath. When the paper is gently tapped the iron filings act like tiny compasses and point themselves along the lines of flux. The magnetic field of an electromagnet is the same as a bar magnet and it looks like this: Electricity has a magnetic effect; a wire carrying a current has a magnetic field round it. The magnetic field around a wire is in the shape of circles. The magnetic effect can be strengthened by: -Using a larger current -Using more turns of wire on the core -Using a soft iron
Properties of Waves.
Properties of Waves There are many different waves including water, sound, light and radio waves. All waves have the same range of properties, they can all be reflected, refracted, totally internally reflected, diffracted or interfere with each other. Waves are repeated oscillations (vibrations) which transfer energy from one place to another. Sound energy in the atmosphere is transferred by the oscillation of air molecules. Movement energy in water waves is transferred by the oscillation of water molecules. Amplitude is the measure of the energy carried by it. Frequency (f) is the number of complete wave cycles per second and is measured in Hertz (Hz). Wavelength (?) is the distance between two successive peaks or troughs and is measured in metres, m. Reflection Light waves travel in straight lines but reflecting them using mirrors can alter their direction. Reflection is the bouncing off of any type of wave from a surface. Reflection can be used to guide a laser past obstacles to a receiver. Shiny surfaces such as mirrors are smooth so reflect all light strongly as all the waves pass in one direction only. Rough surfaces look dull as they reflect light in many different directions causing it to scatter. This is called diffuse reflection. If light waves are reflected, the colour of the surface affects the colour of the reflected ray. Concave surfaces are used
To Find the Quality of Players Playing Rugby for Malvern College 1st XV.
Maths Statistics Investigation Maths Statistics Investigation To Find the Quality of Players Playing Rugby for Malvern College 1st XV Aim I will attempt during the course of this investigation to rate all of the players who played for Malvern 1st XV in the first 6 matches of the 2000 season. In order to do this I must collect the data, analyse each piece of data collected, and then devise some sort of system using a formula that will rate an individual player over the course of the season. This formula must not only calculate the player's point score for each match according to a points system which I shall devise, but also average the points score over the season taking into account time missed through injury. I will also calculate the average standard of player using the mean, and also find the standard deviation to show the average deviation from the mean. Plan In order to devise my scoring system I must first decide on the categories that I shall use for my scoring system. I have decided that there will be two criteria for assessment of a player. These criteria will be: *Time spent on the pitch + time out due to injury, divided by number of matches played to find the average time spent on the pitch. *Coach's assessment percentage score for each match, taking into account position and what is required. I will add up the score for each match and divide by the number
What affects the kinetic energy of a trolley?
What affects the kinetic energy of a trolley? In this experiment I will be trying to see if the amount a spring is compressed affects the speed of a Trolley when released against the trolley. I'll be using a 'light gate' attached to a time to help me to find out how fast the trolley passes the light gate out, from this I will be able to figure out the speed and how much Kinetic energy the trolley has. Plan Aim: To see if the amount a spring is compressed by affects the speed of the trolley pushed by the spring. I will also be looking to see if I can find any patterns in the results I get and see if there is any way I can predict what. Variables: Independent Variable: In this experiment I will have only one independent variable, which I will change though out the experiment. The independent variable will be how much the spring is compressed, each time I compress the spring I will increase it by another centimetre until I have done it from 1 - 15 cm. From this I should be able to see if there is a regular increase in the speed the trolley travels at when I increase the amount that the spring is compressed by. Dependent Variables: I'll have several Dependent variables in this experiment to try and help keep it a fair test. The first one being that I'll keep all the other variables the same (e.g. Mass and Distance). I'll also make sure that I use all the same
What is resistance?
PLANNING What is resistance? Electricity is conducted through a conductor; in this case it is conducted through a wire through means of free electrons. The number of free electrons depends on the material. The more free electrons the better the conductor is. For example, gold has more free electrons than iron therefore gold is the better conductor. The greater the resistance tin a circuit the less current that flows. A variable resistor is able to control the amount of current that flows through a circuit. Increasing the length of wire will increase the resistance. Ohms Law is when the voltage is directly proportional to the current. This means that when the voltage is doubled the current is doubled as well and if the voltage was cut in half the current would cut in half as well. The symbols used in ohms law are V for volts, R for resistance, measured in ohms, and I for the current, measured in amps. The equation V=IR is used to work out the Voltage; I=V/R is used to calculate the current; and R=V/I to calculate the resistance. Predictions I think that the longer the wire is the higher the resistance will be. This is because the longer the wire the more times the free electrons will collide with other free electrons and the particles and impurities that make up the metal. Fair Test To make this experiment fair I will have to make sure that: * The length of
Young Modulus of Copper
Physics TAS Young Modulus of Copper Objectives -Determine the Young modulus of copper by simple experiment -Study the relationship of strain and stress between elastic and plastic deformations of copper -Verify a wire will not return to its original length after certain extensions Preview Questions .Hooke's Law states that the elastic force is directly proportional to the extension (or compression) of the elastic body. A wire obeys Hooke's Law only if it is within its elastic limit. 2.Elastic deformation means a stretched wire will return to its natural length. If the wire is stretched beyond its elastic limit, it will not return to the original length and will make permanent extensions. This is called plastic deformation. 3.A longer wire will extend more than a shorter wire of the same cross-sectional area under the same applied force. 4.As in Q.3 , force constant can be easily affected by geometric factors such as length and cross sectional area. But the stiffness of materials depends on their Young modulus only, which is not affected by geometric factors. So force constant is not a good quantity to compare the stiffness of materials. Apparatus Copper wire ..................1 roll slotted mass with hanger 100g hangers ....................1 100g slotted mass .........~15
