# Homework Help: Pls help me with a simple question

1. Apr 24, 2006

### sekishi

..hi.. im just a newbie here and i am just confuse in this question.....

A Prius and a RAV4 are initially at rest and 1.9 km apart start moving toward each other at the same time. The Prius accelerates at 5.0 m/s² and the RAV4 accelerates at 4.5 m/s² . assume that their acceleration is constant throughout the time duration.

a. At what point from the RAV4's starting point in m will the 2 cars pass each other?
b. how many seconds(from the starting point) will it take for them to pass each othr from the stating point?

why would the ans. in letter a is 900 and in b is 20 s

2. Apr 24, 2006

### Hootenanny

Staff Emeritus
Welcome to PF sekishi,

Please show some working or intial thoughts, you are required to do so before we can help you.

~H

3. Apr 24, 2006

### sekishi

well... i dont know.. mmmhh,, i just add up 4.5 and 5 and get 9.5.... i then divide it in 1900..... and i got 200.... not 900

4. Apr 24, 2006

### Hootenanny

Staff Emeritus
Okay, what kinematics equations do you know?

~H

5. Apr 24, 2006

### Hootenanny

Staff Emeritus
The important point to note here is that the numbers given are acclerations not velcoities.

~H