Asked in Needs a Topic
Needs a Topic
Is a major factor in dictating how much energy the vehicle can absorb to protect the occupants?
We need you to answer this question!
If you know the answer to this question, please register to join our limited beta program and start the conversation right now!
Asked in Cars & Vehicles
What are crumple zones and what are they designed to do?
Why can strategic weaknesses be a strength in vehicle safety?
Asked in Ozone Layer
Do trees protect protect the ozone layer and warming of the planet?
Asked in Science
Why do bumpers need to absorb more force on today's car?
Asked in Physics, Ozone Layer, Visible Light Spectrum
How do things absorb uv rays and reflect them as visible light?
Asked in Botany or Plant Biology
When root hairs absorb water and minerals what protects the root tips?
Asked in Skeletal System
What is the structure and function of spongy bone?
Asked in Global Warming, Air Pollution, Ozone Layer
How photosynthesis organisms help protect life from ultraviolent rays of the sun?
Asked in Cars & Vehicles, Bumpers
How do car bumpers prevent damage or injury to passengers?
Bumpers were initially intended to prevent damage to the vehicle, not the occupants. This is why older cars (1980 and earlier) seem to have bumpers that look more like "bull bars". These days they are more intended to prevent injury to pedestrians. In the case of a vehicle/pedestrian collision the bumper is made of plastic, and backed by some form of collapsible material such as polystyrene. This more likely to deform in a controlled manner and minimise (as far as possible) injury to the pedestrian. The "protection of the occupants" is given over to carefully designing sections of the vehicle to "collapse" under impact and absorb energy (crumple zones), while designing other sections of the vehicle to maintain their shape and protect the occupants (passenger compartment). This is one reason why even a low speed impact can cause extensive damage: The crumple zone did what it was designed to do, and "collapsed" while at the same time preventing damage to the more important part of the vehicle containing the occupants. This effect can easily be seen in Formula 1 vehicles. A car hits something, and seems to fly apart, only to (Hopefully!) leave a small section of the vehicle intact containing the driver. The car has been designed to "fly apart on demand" as the "Flying apart" absorb the energy of the impact, leaving the much stronger "cockpit" intact. The reason for this approach to design is as follows. During an accident/impact one major cause of injury is "rapid deceleration." (slowing down very quickly. It hurts when you hit you head on a wall, but it does not hurt when you hit a mattress at the same speed.) By designing parts of the car to "crumple" you are in effect adding a "mattress". Also a great deal of attention is given to controlling how the "crumple zones" crumple/deform. A second cause of injury is "intrusion of foreign objects". So consideration is given to ensure that the passenger compartment is not penetrated by other parts of the vehicle. For example, It is very common for there to be some form of "locking device" (for want of a better word) at the rear of a hood/bonnet to prevent the bonnet coming off, and going through the windscreen/wind-shield and decapitating the occupants.
Asked in Genetics
Cells may absorb protect and form a filtering membrane?
Asked in Animal Rights and Abuse, Food Spoilage
Why will apples absorb odors of other things around it?
How does ozone protect us from harmful radiation that oxygen cannot?
What does a car bumper do?
The original idea was to have something solid attached to the frame that would prevent damage to a vehicle's expensive body parts. It still does that in very low impact collisions, but has evolved into another expensive body part that must almost always be repaired or replaced after an accident. In combination with 'crumple zones" bumpers are now designed to absorb the impact in a collision and thereby protect the vehicle's occupants.
Asked in Energy
What safety feature is designed as a weak spot in the vehicle to absorb crash energy?