Sketching velocity graph from acceleration graph


by azn4lyf89
Tags: acceleration, graph, sketching, velocity
azn4lyf89
azn4lyf89 is offline
#1
Sep4-08, 02:09 PM
P: 17
I know that the area under an acceleration vs. time graph is the velocity, but how do I use that information to sketch a velocity vs. time graph. Is the area considered the slope for the velocity graph? Also how is it possible for a car to be slowing down during the first half of the motion? Attached is a rough sketch of what the acceleration vs. time graph looks like.
Attached Thumbnails
untitled.JPG  
Phys.Org News Partner Science news on Phys.org
SensaBubble: It's a bubble, but not as we know it (w/ video)
The hemihelix: Scientists discover a new shape using rubber bands (w/ video)
Microbes provide insights into evolution of human language
RoryP
RoryP is offline
#2
Sep4-08, 02:27 PM
P: 76
so on the first thrid of the graph there is constant acceleration so what does this tell you about the velocity?? the middle third there is no acceleration which implies the velocity must be the same. and the last third there is decceleration which implies what about the velocity??
Doc Al
Doc Al is online now
#3
Sep4-08, 02:37 PM
Mentor
Doc Al's Avatar
P: 40,906
Quote Quote by azn4lyf89 View Post
I know that the area under an acceleration vs. time graph is the velocity, but how do I use that information to sketch a velocity vs. time graph.
You need additional information, such as the initial speed.

Note that in this graph, the acceleration increases to a maximum value, stays at that value, then decreases to zero. (Acceleration is only constant in the middle portion of the graph.) If this graph is accurate, and the car starts from rest, the speed is increasing at all times. Is that what you meant to describe?

chislam
chislam is offline
#4
Sep4-08, 08:30 PM
P: 79

Sketching velocity graph from acceleration graph


Quote Quote by RoryP View Post
so on the first thrid of the graph there is constant acceleration so what does this tell you about the velocity?? the middle third there is no acceleration which implies the velocity must be the same. and the last third there is decceleration which implies what about the velocity??
Actually, your wrong. The first third of the graph is an increasing acceleration. The second third is a constant acceleration, and the last third is a decreasing acceleration.


Register to reply

Related Discussions
[SOLVED] Instantaneous Acceleration on a Velocity-Time Graph Introductory Physics Homework 5
Acceleration velocity vs. time graph Introductory Physics Homework 2
Finding acceleration and displacement on a velocity vs time graph Introductory Physics Homework 3
velocity time graph &instantaneous acceleration Introductory Physics Homework 4
Velocity, position, acceleration graph help! General Physics 5