Do you know how car safety tests are carried out?
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Do you know how car safety tests are carried out?
Do you know how car safety tests are carried out? Decades ago, people rarely survived serious car accidents. Cars today are much safer, thanks to improvements in safety tests. During car safety test, a new car is crashed into a wall high speed. Inside the car there are passenger-sized dolls called "crash test dummies." By studying these crash test dummies, scientists can see what would happen to real passengers in a crash and improve the safety of the car. Today's crash test dummies are built to be as much like human beings as possible. They have ribs like ours inside their artificial skin. They even have backbones made out of metal and rubber. Their knees and ankles are designed to act just like ours do in accidents. They also come in different sizes; there is an entire dummy family, including smaller "female" and even smaller "child" dummies. The dummies have three different kinds of sensors that measure the impact of a crash. Sensors in the head, legs, and other areas show how fast a body part moves during a crash. Another sensor can record how much pressure our bones can take before breaking. Finally, a sensor in the chest area shows whether a crash would cause injuries that could lead to death. Crash test dummies are very high-tech, but they're also extremely expensive. Each one costs more than $100,000. A cheaper alternative, however, is being developed. "Virtual" crash test dummies exist only on the computer screen, yet it may be possible to make them even more lifelike than today's crash test dummies. They can easily be altered to resemble people of any height or weight, and, best of all, they can be used over and over without being damaged. In the future, they may completely change the way crash tests are conducted.
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