Understanding G force with car crashes

One of the core philosophies in physics is that energy cannot be created or destroyed; it can only change from one form to another. This idea explains why car crashes can be so destructive. We want to have a closer look at it here. Then, if you need a crash barrier, you can order from us.

Kinetic energy to G force

Vehicles rely on kinetic energy to move. They get it from burning a fuel or utilising electricity. The faster they move, the more kinetic energy they have.

Generally, vehicles rely on friction braking to slow and stop. What happens here is you apply friction to the wheels with the brake pads. When they touch, it turns the kinetic energy into heat. As this happens, the vehicle will gradually slow and lose velocity.

However, vehicles don't get the gradual braking when there is sudden hard braking or an impact. As a result, the kinetic energy can't be turned into heat. Instead it becomes G force. That happens because of the sudden loss of motion.

If you've ever had to do an emergency stop or been in a vehicle doing one, you will know exactly how G force feels. It can be a very strong feeling of being pulled or jolted. In some cases it is merely uncomfortable. However, in others it can cause serious physical injuries and even death.

Crash barrier impacts

When you consider G force, the worst thing to happen is for vehicles to hit an immovable object and stop suddenly. It is much better to hit something that will flex and deform, allowing the vehicle to keep moving and absorbing the kinetic energy gradually. This is what crash barriers are designed to achieve.

Several factors combine to make it much safer for a vehicle to collide with a barrier. Firstly, they deform to cushion the impact and ensure there isn't a sudden stop. Secondly, they spread energy along the entire barrier and to the posts. Thirdly, they prevent vehicles from rebounding back into traffic.

It is important to get the design and placement right with crash barriers. There are three things to factor in; the weight of the vehicles, the speed they travel, and the angle of impact. These can have a big affect on the kinetic energy and level of G force if there is a crash. You need to create barriers that will flex rather than break, even with heavier vehicles and high speeds. The placement should ensure the angle of impact is as shallow as possible.

Do you need to design a barrier?

Whatever kind of site you have, a crash barrier can help you to maximise safety. It can protect against various impacts that would result in sudden stops that generate a lot of G force. For example, you can use them to ensure vehicles won't crash into buildings, street lights, infrastructure, and more.

Barrier Mart is the perfect company if you do need barriers. We can supply Armco and box beam designs, including single or double height ones. We also have a choice of posts, various end pieces, and corners too. As a result, you can find exactly what you need. We can even offer design advice and installation. So, call now or browse our website.