You can’t crack the surface of a bowling pin by pushing on it with your hand, but you can crack that surface by bowling your ball into it fast enough. Explain this effect using the concept of momentum.

since brick is heavy than feather so at that time air resistance on brick will be more than the air resistance on feather

Explanation:

When an object will reach at its terminal velocity then the acceleration of that object will become ZERO

So at that moment of time we can say that net force on the object must be zero or the force of gravity due to its weight is counter balanced by air friction on the object

So when brick will reach to its terminal speed then we have

when feather will reach to its terminal speed

so here we can say that since brick is heavy than feather so at that time air resistance on brick will be more than the air resistance on feather