What should the spring constant k of a spring be in order for it to bring a 1480 kg car to rest from a speed of 91.0 km/h such that the passengers undergo a maximum acceleration of 5g?

k = 5572 N/m

Explanation:

Energy stored in the spring:

1)

Kinetic energy of the car:

2)

Spring force:

3)

Combining equation 1 and 2 and solving for k:

4)

Using equation 3 and solve for x:

5)

Combining equation 4 and 5:

6)

carla slowed down in the beginning of her trip, stopped, and then sped up

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information: because weak acids/bases have low concentration of hydrogen ions, the addition of water has a large impact on the ph. 2. a difference in 1 unit is a 10x difference in concentration for example; a liquid with ph of 3 is 10x more acidic than a liquid with a ph of 4. therefore, a liquid with a ph of 3 is stronger.

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