by Guest » Thu Apr 03, 2014 2:04 am
You can't actually "convert" kg to Nm. The former is a unit of mass, the latter a unit of force.
If what you wanted to do is to find the "weight" of a 600kg mass - that is, the amount of the force of gravity on a 600 kg mass - then you would need to know the strength of the gravitational field that is acting on the mass. If you're reasonably near sea level on the earth (i.e., not in orbit), that's about 9.8 Nm/kg.
So, the force of gravity acting on a 600 kg mass is F = 600 kg * 9.8 Nm/kg = 5880 N = 5.88kN That's the weight of a 600 kg mass on the surface of the earth.
Move to the Moon, where the gravitational field is only one-sixth that of the Earth, and the weight of a 600 kg mass becomes 1/6 of 5880 N = 980 N,