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**Calculating maximum heright of Mass 1 after elastic collision?**

## Homework Statement

Here is the question:

Two blocks are free to slide along the ramp. The bloack of m1 = 5.00kg is released from the position at the top of ramp at height h = 5.00m above the flat part of the track. Protruding from its fron end is the north pole of an identical magnet embedded in the back end of the block mass m2 = 10.kp, initially at rest. The two blocks never touch.

Calculate the maximum height to which m1 rises after the elastic collision. ?

Here is a picture if it helps ya...

## Homework Equations

## The Attempt at a Solution

I am really not sure. I am not given an speeds.

I started out by trying to figure out vel or m1 as it slides down track by going:

mg/l = (5kg)(9.8)/5m = 9.8 m/s - But I am betting that's wrong.

**Im really stuck here. Can anyone help me with the first thing I should be trying to figuring out when looking at this problem specically ?**