If enabled object is affected by physics simulation under certain conditions.

If the Record check box is ticked the object is switched to physics simulation during recording. To record object animations this checkbox has to be ticked.

If the Live check box is ticked the object is switched to physics simulation also while not playing back. Tick this check box if you want to preview physics interaction as well as doing live motion capture without recording.

If disabled object is set to kinematic collision response. Kinematic objects only move out of their own will and are not subject to physics simulation. They ignore world gravity and levitate in place until moved.

You can not interact with an object during physics simulation as motion capture operator but you can grab physics simulated objects as motion capture actor in VR.

The weight (or mass correctly spoken) of the object in kg. Used only if object si physics simulated.