Peyton
4th Grade Kemmler
Swimming
Swimming started in 2500 BCE. It started in Egypt. Swimming started in 1896 in the Olympics. Everything in Egypt is built by the river. People wear swimming caps, goggles, and a bathing suit. There are 4 types of races. They are called backstroke, breaststroke, butterfly, and freestyle. There are all different kinds of distances for racing. They have to push off of the wall to get more speed. People stopped getting in the water because of diseases in Medieval times. Swimming in the United States was the first real sport. In 2008 at the Beijing Olympics they made special swimsuits that deflect water and help you float.
An object at rest stays at rest. A balanced force comes together and they don't move. An unbalanced force is a force that is not equal and the object moves. Drag force is active when your hair soaks in the water and it pulls you back because of the extra weight. Applied force is where you push against the wall to start swimming. Magnetic force is where you flip two magnets over, It does not want to touch. Friction is a force where if you walk on a carpet with shoes it is harder but it is easier without shoes. Swimming is a really fun sport! Tension force is where you poll an object when someone is polling against you. Your body is 60 millimeters of water and 20 millimeters of air, that makes it harder to swim.
Force is applied to mass in order to make it go faster or slower .In other words F=ma \ Force equals mass times acceleration. Acceleration is when an object gains speed or changes direction. There is also a thing called deceleration, this is when an object slows down or changes direction. Mass is the material and volume or the size of an object. In swimming we use acceleration when we push off the wall in order to swim fast. Things that have mass in swimming are the athlete, the pool, the swim cap, and the swimsuit. In swimming the mass affects the acceleration of the athlete but if the athlete has their hair down it will cause drag.
Newton's third law means every action has an equal and opposite reaction. Action is something that is hitting another object. In swimming when the athlete pushes his arm up and cups his hand it pushes the water behind making him go faster. Also when the swimmer pushes against the wall it gives more speed.