Max Acceleration in Linearly Varying Speed: Solving for a0 and K

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Homework Statement


The driver of a vehicle on a level road determined that she could increase her speed from rest to 50 mph in 35 sec and from rest to 65 mph in 95 sec. Assume that acceleration varies linearly with speed (with a non zero intercept). Determine the max acceleration in each case.


Homework Equations



a(v) = a0 + Kv

The Attempt at a Solution



a(0) = a0
a(vmax) = amax
 
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Ok, so a(v)=dv/dt. You forgot that equation. Can you solve dv/dt=a0+Kv?
 
There are two things I don't understand about this problem. First, when finding the nth root of a number, there should in theory be n solutions. However, the formula produces n+1 roots. Here is how. The first root is simply ##\left(r\right)^{\left(\frac{1}{n}\right)}##. Then you multiply this first root by n additional expressions given by the formula, as you go through k=0,1,...n-1. So you end up with n+1 roots, which cannot be correct. Let me illustrate what I mean. For this...
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