4) You reach out over the edge of a balcony to carefully throw a ball upwards at a speed of 3 m/s. The ball is in the air for a total of 4 seconds before it hits the ground. a. With what speed does it hit the ground? '0 (9 +9 :- 455(- v :'19,+ gt top L U : 3 + ( 9.8)(t) 3 t = Q 2 _ _ Lf 3 +( 9.8)(4 g) "1' Z Lf 3+( 9.8)(4 g) = 30.2 12f m/s b. How far from the surface did you release the ball on your toss up? '19: U: = 29h 32 ( 30.2)2 : 2( 9.8)?1 h. = 46. 07 m/s