on earth, the acceleration due to gravity is 9.81m/s^2. since F=m*a, the force produced would be 1kg*9.81m/s^2. That is, 9.81 kg*m/s^2, which is the same as 9.81 Newtons.
Newton is a unit of force, kilogram is a unit of weight, so the two are actually quite different.
On Earth, the gravity is about 9.8 meters per second square, which is the same as 9.8 Newton per...