Fix units

Author: tbeu

ModelicaByExample/DiscreteBehavior/Backlash/Backlash.mo

@@ -2,9 +2,9 @@ within ModelicaByExample.DiscreteBehavior.Backlash;
 model Backlash "Implementing the behavior of a backlash using a 'stiff spring'"
   type Angle=Real(unit="rad");
   type AngularVelocity=Real(unit="rad/s");
-  type Inertia=Real(unit="N.s2/rad2");
-  type Stiffness=Real(unit="N/rad");
-  type Damping=Real(unit="N.s/rad");
+  type Inertia=Real(unit="kg.m2");
+  type Stiffness=Real(unit="N.m/rad");
+  type Damping=Real(unit="N.m.s/rad");
   parameter Angle phi1_init = 0;
   parameter Angle phi2_init = 0;
   parameter AngularVelocity omega1_init = 5;