fix: Distributed Authority Sample - Jitter on FixedJoint connected body [MTT-9071] (#222)

different force application to locomotion fixing child joint jitter

Experimental/DistributedAuthoritySample/Assets/ScriptableObjects/AvatarPhysicsPlayerControllerSettings.asset

@@ -12,8 +12,8 @@ MonoBehaviour:
   m_Script: {fileID: 11500000, guid: 48976c2ba473849eab61b8e1398b8644, type: 3}
   m_Name: AvatarPhysicsPlayerControllerSettings
   m_EditorClassIdentifier: 
-  WalkSpeed: 6
-  SprintSpeed: 10
+  WalkSpeed: 18
+  SprintSpeed: 30
   Acceleration: 50
   DragCoefficient: 4
   AirControlFactor: 0.5

Experimental/DistributedAuthoritySample/Assets/Scripts/Physics/PhysicsPlayerController.cs

@@ -71,13 +71,13 @@ namespace Unity.Multiplayer.Samples.SocialHub.Physics
             {
                 // Apply force proportional to acceleration while grounded
                 var force = velocityChange * m_PhysicsPlayerControllerSettings.Acceleration;
-                m_Rigidbody.AddForce(force, ForceMode.Acceleration);
+                m_Rigidbody.AddForce(force, ForceMode.Force);
             }
             else
             {
                 // Apply reduced force in the air for air control
                 var force = velocityChange * (m_PhysicsPlayerControllerSettings.Acceleration * m_PhysicsPlayerControllerSettings.AirControlFactor);
-                m_Rigidbody.AddForce(force, ForceMode.Acceleration);
+                m_Rigidbody.AddForce(force, ForceMode.Force);
             }
 
             // maybe add magnitude check?