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## Homework Statement

An automobile air bag cushions the force on the driver in a head-on collision by absorbing her energy before she hits the steering wheel. Such a bag can be modeled as an elastic force, similar to that produced by a spring.

Calculate the effective force constant k of the air bag for which the bag will prevent injury to a 65.0kg driver if she is 30.0cm from the steering wheel at the instant of impact.

m = 65 kg

x = .3 meters

F = ?

k = ?

## Homework Equations

__Hooke's Law__

F = -kx

F = force

x = displacement(or the distance traveled)

k = the force constant

## The Attempt at a Solution

Well I know that this should be an easy solution and I first need to find F, but I do not have a speed that the person is moving. I don't know if I am missing something or if i need to contact the teacher and ask for more information.

Personally I view this as unsolvable without more information, but I just figure that I am missing something.

~John

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