A 7 kg block on a flat surface moves from 2 m/s to 4 m/s over 5 m. The coefficient of friction between the block and the surface is 1. How much force was used to move the block?
Honestly, my physics instructor gave us so many worksheets with so many worksheets, I have no clue which one to use.
The Attempt at a Solution
vf^2 = vi^2 + 2a(change in x)
4^2 = 2^2 + 2a(5)
F = 7*1.2
I don't know how friction comes into play though....