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Distance using acceleration and time

  • Thread starter mattykay
  • Start date
  • #1
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Homework Statement


A car accelerates from 15 m/s to 28 m/s in 6.4 s. How far did it travel in this time?


Homework Equations


Unsure- have tried several, and all results have been wrong
Part 1 was to determine acceleration, which is 2 m/(s^2)

The Attempt at a Solution


I've come up with 44, 41, 19, and 83 meters, all of which have been wrong.
 

Answers and Replies

  • #2
Doc Al
Mentor
44,867
1,114
Part 1 was to determine acceleration, which is 2 m/(s^2)
Seems OK

The Attempt at a Solution


I've come up with 44, 41, 19, and 83 meters, all of which have been wrong.
Show what you've done.

There are several ways to solve this. One way is to use the average speed.
 
  • #3
rock.freak667
Homework Helper
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Do you know your kinematic equations?

Alternatively, if you plot a v-t graph, do you know how to obtain the distance traveled from that graph?
 
  • #4
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I got it; I was using one formula, when I should have been using d=((vf+vi)/2)*t
 
  • #5
rock.freak667
Homework Helper
6,230
31
Using d=ut + 1/2 at2 should have given the same answer.
 

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