physics
posted by Anonymous .
An object accelerates uniformly from rest at a rate of 2 m/s2 for 3 s and then 5 m/s2 for 15 s. Find its final velocity?

Do it in two parts.
Or, find the total impulse given
F=ma
1) F=m*2
2) F=m*5
Impulse=2m*3+5m*15
set that equal to the change in momentum mV, and solve for V 
2m/s