- #1
Xen
- 2
- 0
Homework Statement
A truck covers 40.0m in 8.50s while smoothly slowing down to a final velocity of 2.8 m/s. a) Find the truck's original speed b) Find its acceleration
Homework Equations
a= [v-vo]/t-to
Constant acceleration:
v=vo + at
x= xo + vot + (1/2)at2
Constant velocity:
x=vt +xo
The Attempt at a Solution
well I've made pages of attempts in my notebook...but here's a sample of what I've tried
2.8 m/s = Vo + [ (2.8 m/s)2 - Vo2 / 80 ]* (8.50)
2.8 m/s = Vo + 66.64/80 - (8.50Vo2)/80