PhyFl18SS1.5.5 Newton’s is a suitcase. Meaning that it is combo unit that contains smaller units. Many times, you have to open these suitcases when you are doing unit analysis. Other examples of suitcases are Joules (kg.m.m / s. s) and Watts (kg . m . m / s . s. s) but we’ll worry about those later this year.