The most important elements of a functional airbag system are the crash sensors. These electronic elements are designed to indicate when the vehicle has been damaged in an accident. Once an accident is determined by the control unit, a signal is sent to the inflation system. This inflator triggers a chemical charge which produces an explosion of nitrogen gas, which fills the airbag and passes through the panels which contain it and enters the space 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 secure, he will continue to move in the same direction and also at the same speed as the car when the car suddenly stops until a force acts on it. Objects also have momentum, the product of a passenger's mass and velocity. To stop the passenger's momentum, a force must act on him. The airbag provides force over time or through impulse. The more time the force has to act on the passenger to slow them down, the less damage is caused to them.Q2. Head RestraintsToday, head restraints are found in all types of cars to prevent neck injuries that occur during an automobile collision. The head restraint is important to prevent whiplash in the event of a rear-end collision. In some collision cases, when the car hits another object or the brakes are applied quickly, the body always remains in the same position. However, the head is projected either forward or backward. Once the head is thrown in one direction, it naturally throws itself in the other direction because the vertebrae and muscles of the neck force it in that direction. As the neck is thrown in the opposite direction, it goes at a higher speed than when it was first thrown into the tree...... middle of paper...... brown color of latex and we all know the tires are now black. It started with the addition of carbon. However, silica is now added, which helps to preserve the life of the tire for many years and provide better wet grip. Modern car tires aren't just made of rubber and silica. Most modern manufacturers use around 30 components in each tire, for example synthetic rubber, oils and various chemicals that help preserve the rubber. Most drivers take their tires for granted, considering that maintaining them is now just a little bit of air so what. The reality is that car tires have evolved greatly over the years to become tires that can be counted on to perform for several years with minimal maintenance. Additionally, many tires are now available in different designs, giving them different characteristics to achieve better grip, for example in wet conditions..