Moving cars have kinetic energy, which is changed into heat energy when they brake. Safety features in modern cars, such as seat belts and crumple zones, are designed to absorb kinetic energy in a crash.
Moving cars have kinetic energy. As energy cannot be created or destroyed, when a car brakes its kinetic energy changes into heat energy. The brakes heat up and then transfer the energy to the surroundings. Modern cars also have safety features that absorb kinetic energy in collisions. These typically include:
All these features reduce injuries to the people in the car by absorbing energy when they change shape.
As they deform they increase the amount of time the person takes to come to a stop. This reduces the acceleration and force on the person, so reducing injury.
Seat belts have to be replaced after a crash because the large forces may damage them.
These are designed to help you survive a crash with as little injury as possible, or avoid a crash altogether. They include:
There are other features designed to help prevent accidents by reducing distractions while driving. They include:
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