What is the formula for finding initial velocity from acceleration and distance?

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Homework Help Overview

The problem involves a car accelerating along a straight road, with specific details about its acceleration and the distances covered over given time intervals. The objective is to determine the car's initial velocity using kinematic equations.

Discussion Character

  • Exploratory, Conceptual clarification, Mathematical reasoning

Approaches and Questions Raised

  • Participants discuss relevant kinematic equations that relate acceleration, distance, and initial velocity. There are attempts to identify which equations can be applied given the known variables.

Discussion Status

Some participants have suggested listing kinematic equations that incorporate the variables of acceleration, distance, and time. There is a note of disagreement regarding the accuracy of one of the equations mentioned, indicating an ongoing evaluation of the correct formulations.

Contextual Notes

Participants are working within the constraints of the problem statement and are focused on identifying the correct equations without providing a complete solution. There is an emphasis on ensuring all relevant variables are included in the equations discussed.

mcryder16
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Homework Statement



A car accelerates at 1.65 m/s2 along a straight road. It passes two marks that are 30 m apart at times 2.4 s and 4.8 s. What was the car's initial velocity?


Homework Equations




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The Attempt at a Solution

 
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Well you should list some relevant equations. Here is what you know: a, x, and change in time. And you want to know v_0.

So in your list of kinematic equations, do you have an equation that has all 4 of those variables?
 
v = vo + at
s = 1/2 at2
v2 = v02+2as

choose one
 
Your 2nd equation you listed is inaccurate TaiwanCountry. You forgot to mention the initial velocity in that equation.
 

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