Hi , sorry you didn’t get a response sooner. To achieve what you are describing, you would most likely want to use a Physical Material to alter the weight properties of the object. More information on can be found here:
Please let me know if that helps.
Edit: More information can be found here as well https://docs.unrealengine.com/latest/INT/Engine/Physics/PhysicalMaterials/PhysMatReference/index.html