You are tossing pizza dough in the air. You toss the dough straight up in the air with an initial velocity of 5 m/s.
a)How high will your pizza dough go? How long will it take to reach its maximal height?

b)The world record for tossing pizza dough is 6.4m (displacement from your hand to the top of the dough's trajectory). What is the initial velocity needed to reach this height?



This is the entire problem (in case the second part can help somebody help me figure out the first part). I am stuck on what formula to use to figure out the first part. We have a formula to figure out the information when something is thrown or kicked, but the problem states that the dough was tossed straight up into the air. This would not be a parabolic motion, right? So how do I determine what formula to use?

My initial thought was to use the formula vf = vi + at to find time, then vf2 = vi2 + 2ad
to figure out how high it went. If this is the correct way to do it, would I use 9.81m/s2 as acceleration (since it is accelerating in a positive direction rather than accelerating in a negative direction)?