## Homework Statement

Two blocks mass m1 and m2 (m1 greater than m2) are joined by a spring (which can extend and compress) and both rest on a horizontal frictionless table. the blocks are pulled apart, held at rest and then released. describe and explain as fully as you can the sibsequent motion of the blocks (a well labelled velocity time graph would be suitable)

P=mv F=kΔl

## The Attempt at a Solution

What is your difficulty with this problem?

this a question i was set, and i'm not sure how exactly how to describe the displacement time graph, what the zero value should be or whether to think of the blocks seperately or joined? would the motion be aysymmetric as one weight more than the other, as the force inward would relate to the position in the extension so accelation a=f/m would be different for each and would the resulting momentum of the heavier block mean it compresses the spring more on one side
or am i over complicating this/

Have you heard of the center of mass?

yes....

So think of this system in terms of its center of mass. Does it move? Think about the distances and velocities of the two masses relative to the center of mass. Are they related in any way?

HallsofIvy