Nikolai
4th Grade Neville
Cross Country-Skiing
Cross country skiing is a race in the mountains but they go up small hills. First, China and Russia invented cross country skiing when the sport cross country skiing was invented in ( the 13 century ) 1200 and cross country skiing was added into the olympics in 1924. Next the rules of cross country skiing require the competitors must follow the marked course, pacemakers are not allowed, in classic techniques competitions the competitors must use classic techniques only in the match. Though competitors are not allowed to use pacemakers in the match and if a competitor skis on a wrong section or leaves the marked course she or he should return to the point where the error was made in order to do so the competitor may have to ski from the point where the error was made. The equipment and the place you need 2 skis so you can skate on the ice in the olympics and you need 2 poles so you can push off the ice so you can go farther on the ice and you need to be at flat ground of ice. Conclusion cross country skiing can get more interesting for some people.
Newton's first law is when an object is at rest it will stay in rest unless something moves it and something in motion will stay in motion unless something stops it. First balanced and unbalanced forces is when something is not moving from two forces with the same amount of power this is called a balanced force and something that is moving in one direction by a stronger force this is called an unbalanced force some examples of a balanced force is a hand holding a pencil in the air a muscular force is holding the pencil and gravitational force is pulling the pencil inwords. Next rest and motion and something at rest is when something is not moving unless something moves it and something in motion will stay in motion unless something stops it from moving. Another balanced force in my sport are when they are at the starting line they use muscular force to stay up and gravitational force is trying to make them fall on the ice. Lastly, when there’s an unbalanced force in my sport is when they start the race they use muscular force to stay up and they use the speed there making so to help them stay up on the ice. Conclusion these are Newton’s law of motion.
Newton's 2nd law is f=mxa but this means force, mass, and acceleration are Newton’s 2nd law. Something with more mass needs more force to move it and something with less mass needs less force to move. Mass affects acceleration by slowing it down and force affects acceleration by making it go faster or slower or stops it. First, some people might say what is force? Well force is when something or someone pushes or pulls something with more force or less force. Previously, in my olympic sport they used muscular force from their arms mussels to impel them forward to the finish line and they used friction force to assist to stop at the finish line. Next, mass is how heavy something is. The mass in my sport is the gear and the people. The people try to have less mass in my sport. The gear is heavier than you are so they spend lots of money on lit gear so they can go faster down to the finish line. And the people are mass too but they try to get enough muscles to push them forward and less mass to go fast. Next, acceleration is next so acceleration is the object's change in velocity but velocity is a speed and duration. Acceleration in my sport, well they start off still and then they change ther speed by pushing them forward using muscular force to push them forward to the finish line. And they try to slow down and accelerate or decelerate at the finish line. Next, some examples in my sport of how forces impacts the acceleration of different masses in my sport, so they uses muscular force to make them go faster down the track and they are using their muscular force and the acceleration to move them and the gear forward to the forward to the finish line and the friction force helps them slow down the acceleration and to stop the mass from the gear and the people because there's more gravity pulling on them to help stop them. Lastly, the athlete knows they need to get more muscular force and have less mass because their trying to have as much speed as they can. And if they have a lot of gear so they have more mass so they will go slower if they have less force too. And if they have less gear so they will have less mass on them so they will be able to have a bunch of force so they can will go fast but kind of not because the gear is slowing them down and gravity and friction force is helping gravitational force to slow them down. Conclusion, this is Newton's 2nd law of force in my sport and Newton has more laws.
Newton’s 3rd law is about action and reaction. His 3rd law has a little of his 2nd and 1st law of motion. Newton’s 3rd law is every action as an equal and opposite. First, an action is when a force is put on something. They use their poles to push back so they will go forward. And their feet push back and they will go forward. These are examples of action in my sport. Lastly, some examples of reaction in sport but a reaction is when an action is made a reaction goes equal force but it goes the opposite way. When they push back with their feet and their poles the reaction pushes them forward. Conclusion, that's Newton's 3rd law in my sport.