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I hate this lab report so much - I don’t even understand how to do it?

The question is if velocity changes depending on the collision type (two carts hit each other). They want us to calculate momentum then make a BAR graph and add error bars to see if the initial and final fall into each other’s uncertainty range of 10%.

That doesn’t make sense !!! Plus the example BAR graph only shows ONE cart’s momentums ! There’s TWO carts. It’s a system. What did you do to the second cart ?

All you SHOULD have to do is subtract the final and initial velocity of both carts and see if the number is more or less the same - because the carts collide by travelling in opposite directions.

The one in blue is actually positive, I forgot to change the sign to account for the coordinate plane of the system.

What am I supposed to do ? Apparently leave off a cart, but that doesn’t make sense - it’s a system of two. Also why bother calculating momentum, it just makes it more complicated. It’s sue tomorrow before midnight - should I email the teacher and say my way makes more sense (to me) and hopefully be allowed to turn it in like this ?

This doesn’t look right (how they want me to do it):

Also we were told by the substitute to do as many collision types as possible, but I saw other classmates just do three types instead of six. So it’s more work for me and I really just want to delete the extra three.