Homework Help: Graph of two cars problem

1. Jul 31, 2012

Toranc3

1. The problem statement, all variables and given/known data
Two cars, A and B, move along the x-axis. Figure 2.39 is a graph of the positions of A and B versus time. (a) In motion diagrams (like Fig 2.13b and Fig 2.14b), show the position, velocity, and acceleration of each of the two cars at t=0, t=1s, and t=3s. (b) At what time(s) if any, do A and B have the same position? (c) Graph velocity versus time for both A and B. (d) At what time(s), if any, do A and B have the same velocity? (e) AT what time(s) if any, does car A pass car B? (f) At what time(s), if any does car B pass car A?

http://www.freeimagehosting.net/t/s9nhk.jpg

2. Relevant equations

3. The attempt at a solution
Part A:
http://www.freeimagehosting.net/t/f8rqy.jpg

Part B: At t=1s and 3s.

Part C: http://www.freeimagehosting.net/t/4m23n.jpg

Part D : I think at 1<x<3. Somewhere between there. Possibly at 2 seconds I think.

Part E: at 3 seconds car a passes car b.

Part F: After one second car b passes car a until they meet again at 3 seconds. Then car a passes car b.

Is this correct? Thanks in advance!
1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution
1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution

Last edited: Jul 31, 2012
2. Jul 31, 2012