About collision

Hi guys
My Ball falls through the world
What am I missing? Very new to ue4 and making games in general!
Maybe somebody can direct me to a source that helps me out.

Set the ball as the root component in the BP and then open the static mesh and then click the icon at the top to show collision…if it doesn’t show a wireframe collision mesh then you will need to add collision to it, since it is a sphere it shouldn’t be too hard using the built in collision creation from the menu at the top.

Another option would be to set the collision sphere in the BP as the root component and then set its collision that way. with a Scene component as the root you can’t add the collision to it since it can’t have any, that’s why the BP is falling through your world.