Final answer:
High speed increases the risk of collision due to factors such as reduced traction, increased inertia and a greater force of impact. The exception is the claim that high speed increases visibility, which is typically not the case; it can actually reduce visibility due to the speed at which objects are encountered.
Step-by-step explanation:
High speed increases the risk of collision due to several factors, including reduced traction and maneuverability, increased inertia that makes the vehicle take longer to stop, and a greater force of impact upon collision. However, the one exception mentioned is the suggestion that high speed increases visibility. In reality, high speed can actually reduce visibility because objects may approach and pass by too quickly to be noticed properly. In a collision, aspects like dashboard padding, seat belts, or airbags in cars can reduce the force on the occupants by providing a longer time for the force to act, thus lowering the net force and potential for injury. The crumpling of a car upon impact can also lessen the force transmitted to the occupants.
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