Problem 4.06 Part A Constants Calculate the magnitude of the force on a 65-kg pe

Question

Problem 4.06 Part A Constants Calculate the magnitude of the force on a 65-kg person accelerating at this rate. Express your answer to two significant figures and include the appropriate units. A person has a reasonable chance of surviving an automobile crash if the deceleration is no more than 30 "g's. Value Units Submit Part B What distance is traveled if brought to rest at this rate from 100 km/h? Express your answer to two significant figures and include the appropriate units. d Value Units Submit

Explanation / Answer

Accelration is given to be,

a=-30*9.8

=-294

Part A

For this, we can use Newton's second law. We know the mass of the person and her acceleration, So,

F=ma

F=65*(-294)

=-19110N

=-1.9*104N

Part B

Now we have to apply third equation of motion,

V2-U2=2as

0-27.782=2*(-294)s

s=1.3124m

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