Kinematics of particle & acceleration

Lebelee
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Hey,

I am totally lost on this problem set, can anyone lend me some hints and clues as to where to begin on these problems?

thier all simple F=ma conept but thiers inner concepts within them and i get lost, any hints and clues would really be appreciated.

the problem set is located at :

http://www.physics.ubc.ca/~mattison/Courses/Phys170/p170-ps7.pdf

Thanks :)
 
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anyone ? :(
 
did the professor post the solution?

Kevin
 
To solve this, I first used the units to work out that a= m* a/m, i.e. t=z/λ. This would allow you to determine the time duration within an interval section by section and then add this to the previous ones to obtain the age of the respective layer. However, this would require a constant thickness per year for each interval. However, since this is most likely not the case, my next consideration was that the age must be the integral of a 1/λ(z) function, which I cannot model.
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