1) Suppose you used the same balance to find the masses of m and M. Further suppose that this balance was miscalibrated and all the masses you measured were actually 10% larger than your measurement. How would your calculated values for g have been affected?
2) What if the track had been considerable off level? How much energy would have lost to work against gravity as M traveled a distance h down the track when the track slanted uphill at some angle theta? By how much would v2f be reduced ? (note : You do not have to put any numbers into the equations).
3) Can you say that you have"proved" the work energy theorem to be true? Why or why not?