Interpreting and converting an acceleration-time graph

  • Thread starter Thread starter ACSC
  • Start date Start date
  • Tags Tags
    Graph
AI Thread Summary
The discussion centers on interpreting an acceleration-time graph to determine a particle's speed at a specific time. The initial confusion arises from misunderstanding how to calculate speed from the area under the velocity graph. It is clarified that the particle does not slow down to 15 m/s but rather decreases its speed by 15 m/s. The participants review the graph to ensure accurate representation of the deceleration phase. Ultimately, the correct interpretation leads to a better understanding of the graph's implications on the particle's speed.
ACSC
Messages
7
Reaction score
0

Homework Statement



WL9HGAZ.png


Homework Equations



a = Δv/Δt
v = Δx/Δt
x = area under velocity graph

The Attempt at a Solution



According to my second attempt, the answer to "particle's speed at t = 20.0 s?" is not 15m/s either.
Working out picture.
I don't understand where I went wrong. I've always thought that the area under a velocity graph would give the distance.
If t=20s isn't v=15m/s, then maybe that's why? But according to the a-t graph, 5x-3=-15. :S
 
Last edited:
Physics news on Phys.org
Take another look at your graph for the deceleration phase. It slows down by 15m/s.
 
Ibix said:
Take another look at your graph for the deceleration phase. It slows down by 15m/s.

Oh... I see now. It doesn't slow down to 15m/s but slows down 15m/s.
So like this, right?
lL42HNY.png
 
ACSC said:
Oh... I see now. It doesn't slow down to 15m/s but slows down 15m/s.
So like this, right?
[ IMG]http://i.imgur.com/lL42HNY.png[/PLAIN]
That looks good !
 

Thread 'Rolling without slipping on a curved surface'

Kindly see the attached pdf. My attempt to solve it, is in it. I'm wondering if my solution is right. My idea is this: At any point of time, the ball may be assumed to be at an incline which is at an angle of θ(kindly see both the pics in the pdf file). The value of θ will continuously change and so will the value of friction. I'm not able to figure out, why my solution is wrong, if it is wrong .
View full post »

Thread 'Struggling to understand the concept of this question (ice cube in water optics question)'

TL;DR Summary: I came across this question from a Sri Lankan A-level textbook. Question - An ice cube with a length of 10 cm is immersed in water at 0 °C. An observer observes the ice cube from the water, and it seems to be 7.75 cm long. If the refractive index of water is 4/3, find the height of the ice cube immersed in the water. I could not understand how the apparent height of the ice cube in the water depends on the height of the ice cube immersed in the water. Does anyone have an...
View full post »

Similar threads

Will The Cars Stop In Time? - Check My Work Please :)
Replies
13
Views
1K
Given an acceleration figure calculate speed and distance
Replies
1
Views
2K
Find velocity using Force -time graph
Replies
2
Views
4K
Velocity-time graph given. Plot acceleration vs time etc.
Replies
1
Views
8K
Finding the change in velocity from an acceleration vs time graph
Replies
1
Views
3K
Understanding Distance and Displacement on Velocity-Time Graphs
Replies
25
Views
2K
Calculate the speed of a point based on a graph
Replies
40
Views
4K
Displacement from an Acceleration Time Graph
Replies
2
Views
4K
Is the Answer Sheet Wrong? A Closer Look at Velocity-Time Graphs
Replies
7
Views
1K
Calculating tangential acceleration of rotating object
Replies
2
Views
3K

Hot Threads

Recent Insights

Back
Top