The most important parts of a functioning airbag system are the collision sensors. These electronic components are built to signal when the vehicle has been damaged in an accident. Once the control unit detects an accident, a signal is sent to the inflation system. This inflator triggers a chemical charge that produces an explosion of nitrogen gas, which fills the airbag, breaks through the paneling that contains it and enters the passenger compartment of the car with the aim of protecting the passenger. Every object in the car has speed, mass and direction. Therefore, if a person sitting in the car is not secured, he will continue to move in the same direction and even with the same speed as the car was going when the car suddenly stops until a force acts on him. Objects also have momentum, the product of mass and velocity of the passenger. To stop the passenger's momentum, a force must act on him. The airbag provides a force over time or impulse. The more time the force has to act on the passenger to slow him down, the less damage will be caused to him.Q2. Head Restraints Today, head restraints are found in every type of car to prevent neck injuries that occur during a car collision. The head restraint is important to prevent whiplash in rear impacts. In some collisions, when the car hits another object or the brakes are applied quickly, the body remains stationary in the same position. However, the head is thrown forward or backward. Once thrown in one direction, the head naturally throws in the other direction because the vertebrae and muscles of the neck force it in that direction. When the neck is thrown in the opposite direction, it goes at a greater speed than when it was first thrown into the fir... middle of paper... wrinkled latex color and we all know the tires are now black . This started with the addition of carbon. However, silica is now added, which helps preserve the life of the tire for several years and offers better grip in wet conditions. Modern car tires are not just rubber and silica. Most modern manufacturers use around 30 components in each tire, such as synthetic rubber, oils and a number of chemicals that help preserve the rubber. Most drivers take the use of their tires for granted, considering that their maintenance only consists of a little air from time to time. Then. The reality is that car tires have evolved a lot over the years to become something that can be relied on to perform for several years with minimal maintenance. Furthermore, many tires are now available with different designs which give them different characteristics to achieve better grip, for example in wet conditions.