1. IF there are two objects, one is heavier, the other is lighter. Now someone drops them both from the top of a building, which object accelerates faster? do they both have the same acceleration that comes from the earth? 9.81m/s^2? or we use the formula net force=mass* acceleration which the answer may not equal to 9.81. i know the heavy one will land first. but how about acceleration? 2. btw, in our daily life, when we ask people's weight, people may answer like 50kg, are they actually talking about their mass not weight? because our teacher today asked a student's weight, and she answered 50kg, and then my teacher wrote W(weight)=mg=50kg*9.81m/s^2? so my teachcer had actually asked the student's mass, and then calculated weight? thank you.