Even though NASCAR started as a backwoods illegal race to run moonshine [url=http://www.wholesalencaajerseyschinacheap.com/cms/Wholesale-Ucla-Bruins-Jerseys.html]Wholesale Ucla Bruins Shirts[/url] , it has today evolved into a sport that is not only entertaining but depends on physics too. The obvious element in the physics of NASCAR is the aerodynamic design required by these cars in order to achieve top speeds of near 200 mph with the minimum drag coefficient. But there are other forces involved too such as Newtons Law of Motion and centripetal force.

Newtons Law of Motion states that a body will remain in motion unless it is acted upon by some external force. In outer space for example, in the absence of gravity [url=http://www.wholesalencaajerseyschinacheap.com/cms/Wholesale-Usc-Trojans-Jerseys.html]Wholesale Usc Trojans Shirts[/url] , an object will go on forever. So there are forces that resist the movement of a NASCAR vehicle such as wind drag and another known as centripetal force.

Centripetal force should not be confused with centrifugal force. However without getting too technical, you can think of centripetal force as a real force acting perpendicular to the motion of the moving body. Centrifugal force on the other hand is actually a fictitious force and what we feel as we are thrown outward from a moving vehicle is the reaction force.

Centripetal force in the physics of NASCAR is crucial to keeping a car on the track. The tires of the vehicle provide the friction which is part of the centripetal force. The centripetal force needed to keep the car on the track cannot exceed the square of the speed of the car. To put it in simple terms [url=http://www.wholesalencaajerseyschinacheap.com/cms/Wholesale-West-Virginia-Mountaineers-Jerseys.html]Wholesale West Virginia Mountaineers Shirts[/url] , if the car takes a turn too fast, the wheels leave the ground and an accident occurs. The physics of NASCAR dictates that turns on the racetrack must be banked in order to increase the friction (part of the centripetal force) to hold the car.

Another component of physics of NASCAR that serves to keep the vehicle with all four wheels on the track during the race is center of gravity. Center of gravity is basically the point where you could balance the car on the top of a flag pole (theoretically). Racing vehicles need low centers of gravity in order to keep the weight close to the track. If a vehicle has a high center of gravity then it can lose control when it hits a turn much faster. Think of an ambulance with a high profile patient area. If the ambulance took a turn too fast [url=http://www.wholesalencaajerseyschinacheap.com/cms/Wholesale-Wisconsin-Badgers-Jerseys.html]Wholesale Wisconsin Badgers Shirts[/url] , it would topple over. But if its profile was not too high, it could take the turn faster because the center of gravity is lower.

An ambulance needs the high profile in order to get patients in and treat them but the physics of NASCAR dictate the low center of gravity in order to apply more centripetal force and keep it attached to the track on a turn.

Then there is the machining of engine components in the physics of NASCAR that are important for building horsepower with the minimum of friction. You want friction when it comes to centripetal force but you dont want it inside of an engine. This is why internal engine parts are machined to within very accurate tolerances much more accurately than automobiles for family and everyday use. Why? It is because you want to minimize friction inside the engine. When engines torque at these speeds [url=http://www.wholesalencaajerseyschinacheap.com/cms/Wholesale-Alabama-Crimson-Tide-Jerseys.html]Wholesale Alabama Crimson Tide Hoodies[/url] , friction is a very dangerous enemy.

JERUSALEM， July 14 (Xinhua) -- Three Israeli teenagers were arrested this week for allegedly setting ablaze Arab Israelis' cars in northern Israel last month following a Palestinian shooting attack in Tel Aviv.

The three 15-year-olds， from northern Israel， allegedly set fire to two vehicles in a parking lot on June 10 on the outskirts of Yafa an-Naseriyye， an Arab town in northern Israel， police spokeswoman Luba Samri said in a statement on Thursday.

Arab Israelis are Palestinians who stayed in Israel after the 1948 war and are citizens of the state， constituting 20 percent of the population.

The suspects also spray painted the words "price tag" and "revenge" on nearby walls， Samri added.

During the investigation， the three said they were motivated by the June 8 attack at the Sarona dining and retail center in Tel Aviv， in which four Israelis were killed by Palestinian gunmen.

Setting cars on fire and spray painting racial slurs is part of what came to be known in recent years as "price tag" attacks， in which extremist Jews， often youth， carry out bouts of vandalism against Palestinians， Arab Israelis and sometimes at Christian or Muslim religious sites.

"Price tag" acts are usually carried out following unfavorable decisions by the Israeli government regarding the settlements， or after Palestinian attacks， or protesting arrests of extreme settlers.

Israelis and Palestinians have been mired in a wave of unrest since October， which has claimed the lives of 34 Israelis and 216 Palestinians.

Also on Thursday， the Israel Defense Forces (IDF) announced the arrest of six Palestinian suspects in overnight operations in the West Bank.

Security forces seized two weapon manufacturing machines in the area of Hebron， and arrested six Palestinian suspects， three of them in Hebron， and two others in Jenin.

The sixth， an activist of the Hamas Islamist group， was arrested west of Hebron， the IDF said in a statement.

According to the IDF， since the beginning of 2016， Israeli forces have seized 19 weapons manufacturing machines and over 200 firearms in the West Bank.

Israeli leaders accuse the Palestinian Authority of inciting violence， whereas the Palestinians say the latest wave of unrest is the result of 49 years of Israeli occupation of the West Bank， east Jerusalem and Gaza Strip territories， home to several million Palestinians， and where they wish to establish their own state.

RAMALLAH, Sept. 25 (Xinhua) -- Palestinian National Unity Government declared Monday that it is going to hold weekly cabinet meeting [url=http://www.wholesalencaajerseyschinacheap.com/cms/Wholesale-Auburn-Tigers-Jerseys.html]Wholesale Auburn Tigers Hoodies[/url] , for the first time in Gaza city, next Tuesday.

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