Motion at a Constant Acceleration - Newton's Laws

[Ruby3264]

Suppose you want to design an air bag system that can portect the driver in an head-on collision at a speed of 100 km/h. Estimate how fast the airbag must inflate to protect the driver.

The answer to this question would be--

t= 0-28/ -390 = 0.07 seconds using the law X= Xo + Vo t + 1/2 a^t

2. The following question is:


--Assume the car crumples over a distance of about 1 meter. How does the use of a seat belt help the driver?

The Attempt at a Solution

I do not know the answer. I only know that x2 - x1 would be 0 - 100. Can someone please check my work and let me know if I am right or wrong? Thank you for any help.

P.S. -- If any extra equations are needed, I have attached a document with my work. =)

 

[jbsteele]

The use of a seat belt helps the driver by reducing the force of impact to their body by distributing it over a longer period of time. The seat belt limits the movement of the driver and prevents them from being ejected from the car. This also reduces the risk of injury by allowing the body to remain in its natural position during the collision. Additionally, the seat belt can help reduce the chance of the driver being thrown into the steering wheel or dashboard, thus minimizing the risk of serious injury.

 

[Moetasim]

The use of a seat belt helps the driver in several ways. First, it helps to distribute the force of the collision over a larger area of the body, reducing the likelihood of serious injuries. Second, it helps to keep the driver in their seat and prevents them from being ejected from the vehicle, which can also lead to serious injuries or death. Additionally, the seat belt can also slow down the deceleration of the driver's body, giving the airbag more time to fully inflate and cushion the impact. This can help to reduce the force exerted on the driver's body and further prevent injuries. Overall, the use of a seat belt is essential in protecting the driver in a head-on collision, as it works together with the airbag system to minimize the impact of the collision on the driver's body.