# Acceleration vs Time Graph

by Khemkhajon
Tags: acceleration, graph, time
 P: 12 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
 P: 161 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.
P: 12
 Quote by tyco05 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.
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

P: 161
Acceleration vs Time Graph

 Quote by Khemkhajon 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
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.
P: 12
 Quote by tyco05 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.
Think of it as ball rolling down a ramp. it starts at 50m-----------ends at 0m
 P: 161 Hmmm.... maybe you mean speeding up in a negative direction? In that case your statement is correct.
P: 12
 Quote by tyco05 Hmmm.... maybe you mean speeding up in a negative direction? In that case your statement is correct.
so back to the question if its speed was negative and starts to slow down what would the a vs t be?
 P: 161 Maybe you're mixing up your horizontal and vertical components....
 P: 161 if the velocity is in a negative direction and it is slowing down then the acceleration is in the positive direction.
P: 12
 Quote by tyco05 if the velocity is in a negative direction and it is slowing down then the acceleration is in the positive direction.
o ok thankyou

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