1. A ball is thrown upward with an initial velocity of Vo = 20m/s. the acceleration due to gravity is g = -9.8 m/s^2. Given that the displacement y = Vot + 1/2gt^2, find the two times at which the displacement y= 12m above the release point.
2. Assume that the distance x measured in meters(m) is a function of initial speed Vo in meters per second (m/s), acceleration (a) in m/s^2, and time t in seconds. Show that the following formula is dimensionally correct.
X = Vot + ½ at^2
Show step by step please.