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1. The problem statement, all variables and given/known data
http://postimage.org/image/810vdcuvf/


2. Relevant equations

F=ma

3. The attempt at a solution

for part a) i put mdv/dt = -F(brake) - kv

but is lost for what to put in for part b), help?

[dantheman1261]

I take it this follows on from your previous thread.

What are the conditions at the beginning of the braking? Just write those.

Also, k is the same as last time, and you have a value for m and F(brake), which solves the rest of the question.