1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Acceleration vs Time Graph

  1. Nov 13, 2007 #1
    If a object was heading towards the orgin while slowing down. How would the a vs t graph look. I keep thinking it would be a positive acceleration line, but Im not sure wondering if anyone could clarify
  2. jcsd
  3. Nov 13, 2007 #2
    If it is slowing down, what does that say about the acceleration?

    An a-t graph plots acceleration. It doesn't matter if the object is moving towards the origin or away from it.
  4. Nov 13, 2007 #3
    Thats not true. Because if they gave you a x vs t graph of a object heading towards the orgin and speeding up the acceleration would still be negative because of the slope
  5. Nov 13, 2007 #4
    What exactly do you mean by this?

    If something is speeding up, the slope of the v- t graph is positive. Hence the acceleration is positive.
  6. Nov 13, 2007 #5
    Think of it as ball rolling down a ramp. it starts at 50m-----------ends at 0m
  7. Nov 13, 2007 #6
    Hmmm.... maybe you mean speeding up in a negative direction?
    In that case your statement is correct.
  8. Nov 13, 2007 #7
    so back to the question if its speed was negative and starts to slow down what would the a vs t be?
  9. Nov 13, 2007 #8
    Maybe you're mixing up your horizontal and vertical components....
  10. Nov 13, 2007 #9
    if the velocity is in a negative direction and it is slowing down then the acceleration is in the positive direction.
  11. Nov 13, 2007 #10
    o ok thankyou
    Last edited: Nov 13, 2007
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook