Question

If a rock and a feather are dropped in the absence of air resistance, then which object will hit the ground first?

Answer 1

In the absence of air resistance, both the rock and the feather will hit the ground at the same time. This is because gravity acts equally on all objects regardless of their mass. In a vacuum where there is no air resistance to slow down the feather, both objects will fall towards the ground with the same acceleration and reach the ground simultaneously.