Acceleration vs Time Graph


by Khemkhajon
Tags: acceleration, graph, time
Khemkhajon
Khemkhajon is offline
#1
Nov13-07, 07:10 PM
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
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tyco05
tyco05 is offline
#2
Nov13-07, 07:13 PM
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.
Khemkhajon
Khemkhajon is offline
#3
Nov13-07, 07:18 PM
P: 12
Quote Quote by tyco05 View Post
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

tyco05
tyco05 is offline
#4
Nov13-07, 07:34 PM
P: 161

Acceleration vs Time Graph


Quote Quote by Khemkhajon View Post
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.
Khemkhajon
Khemkhajon is offline
#5
Nov13-07, 07:41 PM
P: 12
Quote Quote by tyco05 View Post
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
tyco05
tyco05 is offline
#6
Nov13-07, 07:41 PM
P: 161
Hmmm.... maybe you mean speeding up in a negative direction?
In that case your statement is correct.
Khemkhajon
Khemkhajon is offline
#7
Nov13-07, 07:43 PM
P: 12
Quote Quote by tyco05 View Post
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?
tyco05
tyco05 is offline
#8
Nov13-07, 07:44 PM
P: 161
Maybe you're mixing up your horizontal and vertical components....
tyco05
tyco05 is offline
#9
Nov13-07, 07:46 PM
P: 161
if the velocity is in a negative direction and it is slowing down then the acceleration is in the positive direction.
Khemkhajon
Khemkhajon is offline
#10
Nov13-07, 07:47 PM
P: 12
Quote Quote by tyco05 View Post
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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