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The Main Assumption

Finally, we get to the goal of this lab mentioned in Introduction: determine whether the force was constant during selected time interval.

QUESTION $5$

So$,$ we have solved the problem based on the assumption that only gravity acts on the cart on the inclined track. Now we know there is friction. Was this a valid assumption? Explain and show the relevant calculations in code $($print key results$).$

Hint: find the experimental, relative change of velocity in your data $v($i$.$e$.$ how much velocity actually changed$)$ and compare it with the corresponding theoretical, relative change in v$\_$theo $($i$.$e$.$ how much it would have changed if there was no friction$).$ Recall Lab $02.$