How to make an object fall when player walks into a trigger

I have a few rocks that are placed as platforms in my scene…I want to have them fall with physics when my player walks into a trigger

I made a class blueprint for the rock but have no idea what to do from here… Im new to UE4 and cant find any documentation to help me with this issue.

What you want to do is when the trigger gets activated for it to send a notification to the rock blueprints and tell them to execute the simulate physics function.

I would suggest looking at the blueprint tutorials from the UnrealEngne youtube channel. As well as some of the content examples. To get a feeling for blueprints.

Thankyou for your help