Newton's Laws and finding acceleration

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

A brick of mass 1.0 kg slides down an ice roof inclined at 30 degrees with respect to the horizantal. If the brick starts from rest, how fast is it moving when it reaches the edge of the roof 0.90s later? Ignore friction


2. Relevant equations

Fnet = ma
v2 = v1 + 1/2 at^2

3. The attempt at a solution

I have no idea where to start with this problem. I attempted to find acceleration but just have no clue what to do :S any help would be great thanks !
 
Hi and welcome to physics forums!


Try using:

[tex]v_f=v_i+at[/tex]

Where

[tex]v_f = [/tex] final velocity

[tex]v_i = [/tex] initial velocity

a = acceleration
t = time

What are the values for the variables listed above?
 
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