Question

How many newtons of force are represented by the following amount: 3 kg·m/sec^2?

Answer 1

1 newton is the force that accelerates
1 kilogram of mass at the rate of 1 m/s² .

So in SI base units,  1 newton  =  1 kg-m/s² .

                       and    3 kg-m/s²  =  3 newtons .