# I really need some help with my homwework.

1. Sep 3, 2008

### bmiller13

1. The problem statement, all variables and given/known data

We are doing homework on webassign, and the first set was easy, but I am completly lost this time.

You are driving your car along a country road at a speed of 26.5 m/s. As you come over the crest of a hill, you notice a farm tractor 25 m ahead of you on the road, moving in the same direction as you at a speed of 12.0 m/s. You immediately slam on your brakes and slow down with a constant acceleration of magnitude 10 m/s2.
(a) Will you hit the tractor before you stop?
yes
no

(b) How far will you travel before you stop or collide with the tractor?
m

(c) If you stop, how far is the tractor in front of you when you finally stop? (If you instead collide, enter 0 below.)
m

2. Relevant equations

v=Vo+at
X=1/2(Vo+V)t
x=Vot+ 1/2 at (squared)
v(squared)= Vo(Squared) + 2ax

I have a couple problems other than this i don't understand.

3. The attempt at a solution

i know it wont hit the tractor, but I am lost from there.

Ive tried using all the equations my teacher gave us, but the website still says its the wrong answer, i dont know what im doing wrong.

Last edited: Sep 3, 2008
2. Sep 3, 2008

### Staff: Mentor

Show what and how you did.