(a) A feather and a brick are falling freely in an evacuated tube. Is the magnitude of the gravitational force exerted by Earth on the feather larger than, smaller than, or equal to that exerted by Earth on the brick?

(b) Suppose equal forces of \(10 \mathrm{~N}\) are exerted on both objects for \(2 \mathrm{~s}\). Which object gains more momentum? (Evacuated means all the air has been sucked out of the tube, so that there is no air resistance to hinder the motion.)