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A seat belt applies an opposing force to the driver and passengers to prevent them from falling out or making contact with the interior of the car (especially preventing contact with, or going through, the windshield). Seat belts are considered primary restraint systems (PRSs), because of their vital role in occupant safety.
Child held in a car seat by a five-point harness. A five-point harness is a form of seat belt that contains five straps that are mounted to the car frame. It has been engineered for an increase of safety in the occurrence of an automobile accident. As a result, this form of seat belt has been mandated in the race car competition of NASCAR. [1]
Other forms of safety harnesses include seat belts and child safety seats in cars, which are helping passengers be and feel more safe in a car, Over-the-shoulder restraints, which are mainly used on roller coaster at amusement parks, a seat with a full-body harness like ones used by fighter pilots and racing car drivers, as well as diving ...
Nowadays, however, this area contains highly advanced systems such as anti-lock braking system, electronic stability control and collision warning/avoidance through automatic braking. This compares with passive safety (or secondary safety), which are active during an accident. To this category belong seat belts, deformation zones and air-bags, etc.
Predominantly, 'Failed Barriers' are considered. These are the barriers that should have prevented the incident but failed for various reasons. For example, a barrier to prevent injury in a car is a seat belt; however, this barrier may fail because the driver did not wear a seat belt, or the seat belt mechanism itself was faulty.
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Often links are presented as geometric objects, such as lines, triangles or squares, that support schematic versions of the joints of the mechanism or machine. [1] For example, the figures show the kinematic diagrams (i) of the slider-crank that forms a piston and crank-shaft in an engine, and (ii) of the first three joints for a PUMA manipulator.
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