# Simple kinematics problem

1. Dec 5, 2007

### Leotav

1. The problem statement, all variables and given/known data
So the problem says that three turtles starts to move each from a vertice of a equilateral triangle with a constant velocity v as shown in the pic. They move towards each other ( the first one moves towards the second the second towars the third and so on ). It asks: When they are going to collide?

http://img337.imageshack.us/img337/1038/77228846fl6.jpg" [Broken]

2. Relevant equations
none

3. The attempt at a solution
all my tries were unsuccessful thats why im asking for help ;p

tips are welcome

Last edited by a moderator: May 3, 2017
2. Dec 5, 2007

### dst

Never. I don't see why they should.

3. Dec 5, 2007

### Leotav

I forgot to mention that they're not going stay moving only on the triangle path, sorry.

4. Dec 5, 2007

### Shooting Star

Calculate the change of area A of the triangle as a function of time, and then solve for t when A=0.

If each has moved dx in time dt with speed v, what's dA/dt?