Homework Help: Two carts on a frictionless AIR Track held together then released with a sping.

1. Jun 5, 2012

SharpCode

1. The problem statement, all variables and given/known data
Two carts 'a' and 'b' are floating on a frictionless air-track and are stationary. 'a' is three times the mass of 'b'. They are being held together and there is a spring between them. The carts are released. Describe what happens after the release.

2. Relevant equations
Im guessing the usual Kinetic Energy equations are relevant here

3. The attempt at a solution
Well not sure if i am on to something but cart B will definitely go further than cart A as it weighs less and the acceleration of Cart B will be significantly quicker too. But i am confused with the forces acting on them in this situation. It says to describe only but want to know a bit more detail if possible.

2. Jun 5, 2012

sas3

I am very tired and read this message as "two (cats) on a frictionless AIR Track held together then released with a spring", and had a good laugh, thinking if they were alive or dead.

LOL

3. Jun 5, 2012

SharpCode

I thought i had misspelled something for a second :p

4. Jun 5, 2012

sas3

You did "spring" not sping.

Oh, Carts not Cats..... LOL