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## Homework Statement

I have done a cart experiment, were 1 cart collides with another that is stationary in a straight line. i have videotaped my experiment and used logger pro to evaluate my findings. it gives me different velocity's, in each time frame. which velocity do i use to work out the momentum?

## Homework Equations

## The Attempt at a Solution

i used the equation d=1/2(u+v)t