Personalized Helmet

Helmet Safety

A helmet should be both comfortable and snug. It should be worn level with your head—not tilted back on the top of your head or pulled too low over your forehead. Once on your head, the helmet should not move in any direction, back-to-front or side-to-side.

Define relationships between the elements of the helmet and build the assembly

The chinstrap on the bottom of the helmet should be adjustable, for those who may have bigger or smaller heads. In order so they can wear it correctly, and safely. Another element of the helmet that not many consider is the general shape of the circular top. It needs to be able to fit comfortably on anyones head, instead of simply sitting on top.

Describe how helmets provide impact protection by dissipating crash energy

People wear helmets while they are biking, riding motorcycles, skiing/snowboarding, and during many other activities that have a risk of falling on or near your head. Most race car drivers even wear helmets to prevent whiplash. Helmets are a way to protect your head/brain from injuries including cuts and skull fractures. Helmets create a protective layer around the skull and brain and thus protect the wearer from serious brain injuries. The overall aim of a helmet is to reduce the impact of force or collision of the head.

Explain Newton 2nd Law of Motion

Newton's second law is a quantitative description of the changes that a force can produce on the motion of a body. It states that the time rate of change of the momentum of a body is equal in both magnitude and direction to the force imposed on it. Your brain is cushioned only by a very thin layer of cerebrospinal fluid. It will also follow Newton's law until it presses up against your skull. There is no way to break the laws of physics but you can take steps to lessen their force with the use of a motorcycle helmet.

Calculate impact force

To calculate impact force, divide kinetic energy by distance.

K.E. = 1/2 m v2

So if our helmet was moving at 30mph and ways 5 Ib, the kinetic energy would be 1020 Jules. If the helmet was moving for 100 feet, the total impact force would be 10.20.

The helmet would be able to withstand such impact forces by absorbing a large amount of the impact force. By preventing the direct force on the human brain by absorbing it though the helmet, this highly reduces the direct impact force on the human brain and decreases the risk of our users getting a concussion or severe brain damage.

Explain how friction and mass affect motion

An object of large mass is pulled down onto a surface with a greater force than an object of low mass and, as a consequence, there is greater friction between the surface of the heavy object than between the surface and the light object. The characteristic of a high friction surface tends to be coarseness. Friction is one kind of force which is created on the unsmooth surface obstacling the motion of object. As F=ma and friction is a force so,the mass of an object affect friction, if mass is much,friction will be more. If mass is low, then friction will be merrier.

Describe the general structure and material used to create a helmet

Helmets are made with an inner EPS (expanded polystyrene foam) shell and an outer shell to protect the EPS. The density and the thickness of the EPS is designed to cushion or crush on impact to help prevent head injuries. Four basic parts include the outer shell, an impact absorbing liner, comfort padding, and a good retention system. The most common materials for a basic helmet include fiberglass, which is an inexpensive, lightweight, and strong material. Some skating and biking helmets are made of polycarbonate plastic or ABS, but as the difficulty and danger level for the activity rise, as do the material strength levels.

Reflection

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