I need help with these!

One steel ball and one aluminum ball are the same size but the steel ball weighs twice as much as the other. The balls are dropped from the roof of a single-story building at the same instant of time. The time it takes the balls to reach the ground below will be: O considerably less for the heavier ball, but not necessarily half as long. O about the same for both balls. O about half as long for the lighter ball as for the heavier one. O considerably less for the lighter ball, but not necessarily half as long. O about half as long for the heavier ball as for the lighter one.The positions of two blocks at successive KILLEDsecond time intervals are represented by the numbered squares in the gure below. The blocks are moving toward the right. I 2 3 4 5 is 7 mm a I I I I I I I t. I I I I I mm" 1 2 3 4 s The accelerations of the blocks are related as follows: (Z) The acceleration of "a" is greater than the acceleration of " la". @1 The acceleration of "la" is greater than the acceleration of ""a (:3 The acceleration of "a" equals the acceleration of "|J' Both accelerations are greater than zero. 0 The acceleration of "a" equals the acceleration of "o". Both accelerations are zero. (Z) Not enough information is given to answer the