Question

What should be the spring constant k of a spring designed to bring a 1,466.39 kg car to rest from a speed of 93.00 km/hr so that the occupants undergo a maximum acceleration of 4g?

Answer #1

Given,

Mass of car is

Intial speed is

Acceleration is

As the car comes to rest, final speed is

Let the distance moved by spring before the car comes to rest be

then,

The spring force is

where k is the spring constant

we can write this as

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