A 4.0-kilogram rock and a 1.0-kilogram stone fall freely from rest from a height of 100 meters. After they fall for 2.0 seconds, the ratio of the rock’s speed to the stone’s speed is
(1) 1:1 (3) 2:1
(2) 1:2 (4) 4:1
It has nothing to do with the weight of the object, and thus they both fall at the same velocity. Therefore, the answer is (1).
Objects that are in free-fall move under the influence of gravity alone; they do not experience air-resistance. More massive objects will not fall faster, unless there is a significant amount of air resistance. In summary, all objects that are in free-fall will have the same rate of acceleration, regardless of taking their mass into account. Topsquark can probably elaborate far more than I can on this physics question.