What Was the Initial Velocity of an Object That Traveled 120m in 5.60s?

AI Thread Summary
To find the initial velocity of an object that traveled 120m in 5.60s with a final velocity of 15.0m/s, the relevant equations include v = d/t and a = (v2 - v1) / (t2 - t1). The discussion raises the question of whether acceleration needs to be considered in the calculations. The user is unsure if the object started from rest and is seeking clarification on their approach. Ultimately, the book indicates that the initial velocity is 28 m/s.
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Homework Statement


What was the initial velocity of an object that moved 120m in 5.60s, reaching a final velocity of 15.0m/s in that time?


Homework Equations


v=d/t
a=v2-v1/t2-t1



3. The Attempt at a Solution
I was wondering is there an acceleration that I'm missing here? or am i just off?
I've been using this eq. v1=v2-a(changeintime)
Someone help :(
 
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was the object at rest?
 
The book's answer is 28 m/s =S
 

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