Difference between mass and weight

Question 1

Mass (Kg)

Answer 1

How much material an object is made of. Affects acceleration: (F=ma)

Question 2

Weight (N)

Answer 2

Gravitational force of a very large object on a much smaller object (W=mg)

Question 3

free fall

Answer 3

When the only force acting upon an object is weight. => a=g

So ignoring air resistance, all objects fall at the same a (10m/s^2 on earth).