Here's why:
* Equilibrium means that the net force acting on an object is zero. In other words, all the forces acting on the object are balanced.
* On an incline, there are several forces acting on the crate:
* Gravity: pulling the crate straight down.
* Normal force: acting perpendicular to the incline, pushing the crate against the surface.
* Friction: acting parallel to the incline, opposing the tendency of the crate to slide down.
* Stationary: The crate is not moving, which means its acceleration is zero.
Since the crate is stationary, its acceleration is zero. This means that the forces acting on it must be balanced. Therefore, the crate is in equilibrium.
