wat is point and plane of application(structures and stability?

Answer 1

point of application is the precise singular point a load is applied to a structure. Plane of application is likely the 2 dimensional plan normal to the direction the load is applied from.

To make it a little clearer, take a pencil and point it straight down at a piece of paper, then touch it with the lead, the dot you made is the point of application, the plane of application is the piece of paper. The load is you pushing the pencil on the paper.