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# Track and Field Physics

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## Hallie Searcy

on 20 February 2013

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#### Transcript of Track and Field Physics

Friction Speed The Physics of Track and Field By: Hallie Searcy Potential Energy High Jump The rate of change in the speed of an object Newtons 1st Law an object in motion will stay in motion and an object at rest will stay at rest, unless acted upon by an outside force. Newtons 2nd Law If you wanted to find the amount of force it takes to throw either the javelin, discus, or shot you would need to multiply the mass of the object by its acceleration. What is Track and Field? Acceleration Momentum Kinetic Energy Athletic events that take place on a running track or a nearby field force= mass x acceleration Newton's 3rd Law of Motion For every action there is an equal and opposite reaction Javelin Discus spear is about 2.5 m (8 ft 2 in) in length Jan Zelezny - 98.48 m Due to inertia, the javelin, discus, and shot should (once thrown) continue to go in a straight line forever. But because of outside forces such as...

gravity
friction with air

...they fall to the ground JAVELIN Discus wood or metal with a sharp metal point men: 800 grams (1.8 pounds). women: 600 grams (1.3 pounds) heavy disc men: 2 kilograms (4.4 lb) women: 1 kilogram (2.2 lb) sides made of plastic, wood, fiberglass, carbon fiber or metal with a metal rim and a metal core Shot Put Shot Put men: 7.260 kilograms (16.02 lb) women: 4 kilograms (8.8 lb). rest the shot close to the neck, and keep it tight to the neck throughout the motion EXAMPLE (Discus) Force= mass x acceleration mass: 2 kg acceleration: 35 m/s force: ? F= 2 x 35

F= 70 N It would take a force of 70 N to throw a discus that has a mass of 2 kg 35 m/s. Sprinters use starting blocks to start out faster. The sprinter applies a force to the starting blocks. As a result, the starting blocks apply an equal farce, causing the sprinter to go faster. Track and field is composed of many different events including...
hurdles
sprints
javelin
shot put
relays
long jump
high jump
distance running, etc. Thank you! potential energy The two athletes below have the greatest amount of stored energy when they are at the peak of their height. High Jump kinetic energy The two athletes below have kinetic energy when they are going up and coming down because that is when they are in motion. momentum= mass x velocity
p= m x v
The greater the momentum, the more force it will take to stop the object Discus The athlete will spin in circles to gain momentum so that the disc can be thrown farther. High Jump To gain momentum before jumping, an athlete will sprint along a lane. This will help a jumper to build up speed so that he/she can jump a farther distance. Video You can find friction almost anywhere in this sport. It is found anywhere where two things touch. EXAMPLE: There is friction between a runners shoe and the track. How fast an object is moving. speed= distance/time You can find the speed of lots of things in track if you just know how far the object traveled and how long it took for the object to travel that distance. EXAMPLE: v= d/t
v= 100/11
v= 9.09 m/s distance: 100m
time: 11 seconds
speed: ? Final Speed-Beginning Speed Acceleration= Time definition POSITIVE ZERO NEGATIVE Speed up Slow down

also called "decelerate" Remain at a constant speed EXAPLE: 3200m (2 miles) a= V - V 2 1 t time final speed beginning speed V = 1.5 m/s
V = 8 m/s
t = 4 sec
a = ? 1 2 8 - 1.5 a= 4 a= 6.5 4 a= 1.62 m/s 2 The girl accelerated 1.62 m/s 2 heavy medal ball Sources http://espn.go.com/espn/sportscience/index ESPN Sports Science http://www.livestrong.com/article/148497-physics-in-pole-vaulting/ Physics in Pole Vaulting http://sportsnscience.utah.edu/track-and-field/ Sports 'n Science>> Track and Field http://topendsports.com/sport/athletics/biomechanics.htm Track and Field Physics http://www.nbclearn.com/portal/site/learn/science-of-the-summer-olympics Videos on the Physics of Track and Field
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